How to Fast Effectively as a Christian: A Beginner’s Guide to Fasting and Prayer

If you are a Christian, fasting should not be something you only hear about when your church announces a 21-day fast at the beginning of the year. Fasting is a biblical spiritual discipline, and throughout Scripture we see God’s people fasting when they were seeking Him, repenting, praying for direction, grieving, or preparing for something significant.

Jesus Himself spoke about fasting as something His followers would practise. In Matthew 6:16, He says, “When you fast…” He doesn’t say, “If you ever decide to fast.” Jesus was teaching His disciples how to fast properly.

That doesn’t mean you need to wake up tomorrow and announce that you’re doing a 21-day fast. If you’ve never fasted before, please don’t feel pressured to start with an extended fast simply because you’ve heard other Christians talk about doing one.

Start where you are. You could begin with 12 hours. You could fast for one meal. You could eventually work your way towards a 24-hour fast and, as you become more accustomed to fasting, prayerfully consider longer periods.

The point isn’t to compete with somebody else’s fasting record. The point is to seek God.

Fasting Is a Biblical Discipline

One of the things I have had to realise about fasting is that it isn’t supposed to be this mysterious spiritual activity reserved for pastors, prophets and people who apparently have never enjoyed a plate of chips.

Fasting is biblical.

We see people fasting throughout both the Old and New Testaments. Moses fasted. David fasted. Esther called for a fast. Ezra proclaimed a fast. Daniel fasted. Jesus fasted. The early church fasted before making important decisions.

In Acts 13:2–3, the believers were “worshipping the Lord and fasting” when the Holy Spirit directed them regarding Paul and Barnabas.

Fasting was part of the life of the early church.

So while Scripture does not give every Christian a specific weekly fasting schedule, I don’t think fasting should be treated as something we can simply ignore indefinitely. If you have never fasted before, start learning. Try it. Pray about it. Give God some of your time and something that is meaningful to you as an act of surrender.

God has already given us so much.

Sometimes we can spend hours asking God for things, but struggle to give Him a few hours of our time and attention. Fasting is one way of saying, “Lord, I want You more than I want this thing I’m giving up.”

Start Small If You Have Never Fasted Before

If you’re a babe in Christ and you’ve never fasted in your life, please don’t jump straight into a 21-day fast because you feel like that’s what a “real Christian” is supposed to do. Take it slowly.

Start with 12 hours if that’s where you need to begin. If you feel ready for a full day, try 24 hours. Eventually, you may feel led to attempt a three-day, seven-day or longer fast. There is nothing wrong with starting small.

At the same time, be honest with God about the commitment you’re making. If you decide, “Lord, I’m going to fast for 24 hours,” then genuinely intend to fast for 24 hours. Don’t tell God you’re committing to a full day when you’ve already decided that you’ll probably give up after lunch because you’re hungry.

Ecclesiastes 5:4–5 warns us about making vows to God and then failing to keep them. Our relationship with God should be characterised by sincerity. Fasting is about sacrifice and surrender, not trying to impress God with how long you can go without eating.

Decide What You Are Fasting For

Before you begin your fast, take some time to pray about why you’re fasting.

Perhaps you are asking God for wisdom about a decision. Maybe you’re praying about your family, your career, your finances, your spiritual life or a difficult situation. Perhaps you are fasting because you simply want to spend more intentional time with God. Whatever the reason, bring it before Him.

You don’t need to make some elaborate announcement. You can simply pray and say, “Father, I am choosing to fast for the next 24 hours. I am bringing this situation before You. I ask for Your wisdom, Your direction and Your will. Help me to seek You during this fast rather than becoming focused only on what I am giving up.”

Sometimes you may also feel that God is leading you to fast without immediately understanding why. In that situation, you can simply surrender it to Him: “Lord, I don’t know exactly why You are leading me to fast, but I want to obey You. I dedicate this time to You. Show me what You want me to see, pray about and learn.” The important thing is that you are intentionally bringing the fast before God.

Fasting Is Not a Performance

This is one of the most important things Jesus taught about fasting. In Matthew 6:16–18, Jesus says that when His followers fast, they should not look miserable or deliberately make themselves look as though they are suffering so that everyone knows they are fasting. He says the hypocrites do this because they want other people to notice them.

Jesus’ instruction is essentially: don’t turn your fast into a public performance. Your fast is between you and God.

You don’t need to post, “Day 4 of my fast!” on Instagram. You don’t need to announce it in every group chat. You don’t need to make sure everyone at work knows that you haven’t eaten since yesterday. Jesus says to wash your face and carry on normally so that your fasting isn’t something you do for human approval. This is important because fasting can very easily become another thing we use to make ourselves feel spiritually superior.

If You’re Not Seeking God, Are You Actually Fasting?

Let’s be honest. If you spend the entire day avoiding food but spend those same hours doomscrolling TikTok, watching random videos, arguing with people online and consuming everything except an actual meal, what exactly are you doing? You’re hungry. That’s it. That’s not necessarily fasting. That’s a hunger strike with Wi-Fi.

The purpose of fasting is to turn your attention towards God. Matthew 4:4 says, “Man shall not live by bread alone, but by every word that comes from the mouth of God.” You’re deliberately putting aside physical food and reminding yourself that food isn’t the ultimate source of your life. You need God. You need His Word. You need His presence.

So when your stomach starts reminding you that you haven’t eaten, let that hunger become a reminder to pray. Instead of reaching for your phone to distract yourself from the hunger, reach for your Bible. Instead of spending your lunch break scrolling, spend some of it praying. Instead of filling the silence with entertainment, worship.

If you have a sermon you’ve been meaning to listen to, listen to it. If you’re at work, you can listen through your earphones when appropriate. You don’t need to spend every minute of the day in prayer, but you should be intentionally redirecting your attention towards God.

Spend the Day With God

Once you’ve started your fast, the goal shouldn’t simply be to make it through the day without eating. The time you’ve created by giving up food should be used to intentionally seek God. There isn’t one prayer schedule that every Christian has to follow during a fast, but I find it helpful to have set times during the day when I know I will stop what I’m doing and spend time with God.

Personally, I like using the prayer watches as a framework. I may pray around midnight, again at 6 a.m., around 9 a.m., around noon, and then break my fast at 6 p.m. There are other prayer watch hours that you can use, and you don’t have to follow the exact schedule that I do. The point is simply to create intentional opportunities throughout the day to pray and spend time in God’s presence.

Psalm 63:1 says, “O God, you are my God; earnestly I seek you; my soul thirsts for you.” That is the kind of posture we should have during a fast. We aren’t simply trying to get to the end of the day so that we can finally eat again. We are using that time to seek God more intentionally.

Pray throughout the day. Read your Bible, worship, listen to sermons, journal, sit quietly before God and allow yourself time to think about what He may be showing you. If you’re working during your fast, you obviously still have responsibilities to take care of. You don’t need to spend eight hours on your knees instead of doing your job. You can listen to a sermon or gospel music through your earphones when appropriate, pray during your breaks, and quietly turn your thoughts back towards God throughout the day.

Fasting should create more space for God in your day, not simply remove food from it.

Pray Scripture Over What You’re Believing God For

If you’re fasting and praying about something specific, one of the most practical things you can do is find Scripture that speaks to that particular area. If you’re asking God for wisdom, study what the Bible says about wisdom. If you’re dealing with fear, look for Scriptures that remind you of God’s presence and faithfulness. If you’re praying about provision, spend time reading what Scripture says about God’s care for His people.

You can write those verses down in a notebook, save them in your phone, or keep them somewhere you can easily access them during your fast. Read them during your prayer times and return to them throughout the day.

This can be especially helpful when doubt starts creeping in. Fasting doesn’t mean that suddenly every thought you have will be spiritual. You may become discouraged, distracted or tempted to wonder whether your prayers are making any difference. When that happens, go back to the Word of God.

We can pray boldly while still surrendering the outcome to God. Jesus demonstrated this in the Garden of Gethsemane when He prayed, “Not my will, but yours, be done” (Luke 22:42). That should also be our attitude when we fast. We can bring our requests honestly before God while still saying, “Lord, this is what I’m asking You for, but above everything else, I want Your will.”

Fasting Should Change More Than Your Eating Habits

Isaiah 58 is an important chapter to read when learning about fasting because it shows us that God is concerned about what happens in our hearts and lives, not just whether we have gone without food.

The Israelites were fasting, but God challenged them because their religious practice was disconnected from the way they were treating other people. They were fasting while continuing to live in ways that did not reflect God’s heart. Their problem wasn’t that they weren’t hungry enough. Their problem was that they were focusing on the outward act of fasting without allowing God to deal with what was happening within them.

That should make us examine ourselves when we fast. If God brings unforgiveness to the surface, deal with it. If He reveals an attitude that needs to change, take it seriously. If there is an area of deliberate sin that you have been refusing to surrender, don’t use fasting as a way of making yourself feel spiritually better while continuing to do what you know is wrong.

Fasting isn’t a loophole. You cannot deliberately live however you want and then use a fast as a religious reset button. We are still called to obey God, repent when we sin and allow Him to transform our character.

This doesn’t mean that you need to become perfect before you fast. None of us would qualify if that were the requirement. It means that fasting should make us more willing to surrender ourselves to God, including the areas of our lives that we’d rather keep under our own control.

Fasting Doesn’t Make God Owe You Anything

It’s also important to understand what fasting is not. Fasting is not a transaction where you give up food and God is then obligated to give you what you asked for.

You can fast for three days, seven days or 21 days, but that doesn’t mean God owes you the job, relationship, financial breakthrough or particular outcome you’ve been praying about. We don’t fast to manipulate God.

God is not a vending machine where you put in enough fasting and receive the answer you wanted. Fasting is about seeking God, surrendering our desires to Him and becoming more sensitive to His direction. We can absolutely pray with faith and believe that God can answer our prayers. At the same time, we need to be willing to trust Him if His answer looks different from what we expected.

Sometimes God changes the situation we are praying about. Sometimes He changes us in the process. Sometimes He gives us an answer we weren’t expecting, and sometimes He asks us to wait. The important thing is that our faith isn’t dependent on getting the exact answer we wanted.

Be Wise About Your Physical Health

Fasting is a spiritual discipline, but we still have physical bodies that need to be treated responsibly. There are different types of fasts, and not everyone should attempt an extended food fast without considering their individual circumstances.

If you have a medical condition, take medication, are pregnant or breastfeeding, have a history of an eating disorder, or have another reason that fasting could be unsafe for you, speak to an appropriate healthcare professional before attempting a food fast.

There is no prize for making yourself dangerously ill in the name of spirituality. You don’t need to prove your faith by ignoring legitimate health concerns. If a particular type of food fast isn’t appropriate for you, prayerfully consider another form of intentional sacrifice while still making time to seek God. The purpose of fasting is not to punish your body. It is to turn your attention towards God.

How to Break Your Fast

When your fast is over, don’t forget to pray. Thank God for the time you have spent with Him, reflect on what you have learned and write down anything you believe He highlighted to you. If your fast has revealed something about your heart or your relationship with God that needs to change, don’t simply move on because the clock says your fast is finished.

The end of your fast should not mean the end of what God was doing in you.

If you’ve completed a longer fast, you should also be sensible about how you return to normal eating. After an extended or restrictive fast, it may not be wise to immediately eat a large, heavy meal. The longer the fast, the more important it is to approach breaking it carefully and, where appropriate, seek professional health guidance.

And please don’t spend seven days fasting and praying only to celebrate the end of your fast by attacking the kitchen like you’ve just won a food-related lottery. Your body may have other opinions.

More importantly, take what you learned during the fast into your everyday life. If God convicted you about something, respond to it. If you developed a stronger prayer life, continue praying. If you discovered a deeper hunger for Scripture, keep reading your Bible.

The fast may have an ending date, but your pursuit of God doesn’t.

You Don’t Need to Become a Spiritual Superhero

If you’ve never fasted before, start somewhere. You don’t need to begin with 21 days simply because you’ve heard other Christians talk about long fasts. Start with 12 hours if that’s where you are. Work towards a full day. Learn what it feels like to intentionally set aside food and use that time to seek God. As you grow, you can prayerfully consider longer periods of fasting.

At the same time, don’t turn fasting into a competition. The person who fasts for 21 days isn’t automatically closer to God than the person who fasted for 12 hours. The number of days doesn’t determine the sincerity of your relationship with God.

Jesus said, “When you fast” (Matthew 6:16), so fasting shouldn’t be treated as some strange activity reserved for exceptionally spiritual Christians. It is a biblical discipline that we can learn and practise as part of our walk with God.

And when you fast, remember Jesus’ words in Matthew 4:4: “Man shall not live by bread alone, but by every word that comes from the mouth of God.” That is at the heart of fasting. For those hours or days, you are deliberately setting something aside to remind yourself that you need more than physical food. You need God. You need His Word. You need His presence.

Fasting gives us an opportunity to step away from some of the things that constantly demand our attention and intentionally turn our attention back towards the One who gave us everything in the first place. So start where you are. Pray. Seek God. Read His Word. Worship Him. Repent where He convicts you. Bring your requests before Him and surrender the outcome to His will.

James 4:8 says, “Draw near to God, and he will draw near to you.”

Fasting is one way we can intentionally make room to do exactly that.