I'm sure you're able to testify that at times, when we make a request to God, God often wishes to answer in a better way than we’ve prayed for. Therefore, I believe sometimes God denies our prayer requests because we’re thinking and asking too small. He wants to give us something bigger and better that will put His glory on display! But first, he has to prepare our hearts for it. So God uses delays in answering our prayer to help us grow, get ready, and prepare us for a bigger and better answers.

2.) Persistent prayer works to focus our attention.

God doesn’t need to be reminded! I believe it's more to remind us Who the source of our answers and all our needs is. If every prayer you ever prayed were instantly answered we might be tempted to look upon God as a Genie and fail to revere Him as we should. God wants us to reverence the Blesser over the blessings. 

3.) Persistent prayer clarifies our request.

A delayed answer gives us time to search within to see exactly what we are asking for and to refine our prayers if need be. I believe when we persist in prayer to your heavenly Father, it tend to separate the deep longings from mere whims. It’s not that God doesn’t want to answer our prayers, but He wants us to be certain of what we really want.

4.) Persistent prayer tests our faith.

James 1:3-4 says, “When your faith is tested, your endurance has a chance to grow. So let it grow, for when your endurance is fully developed, you will be perfect and complete, needing nothing” (NLT). I believe God uses these times to grow our faith and those closest to us. Just think how Hannah's faith grew once her prayer was answered - enough to give her son Samuel back to God. Spiritual maturity comes from having our faith tested, one of the ways God’s going to test our faith is by delaying some answers to your prayers.

Finally, we need to remember while we are persisting in prayer that: 

• God does hear our prayers. 
• He knows our heart and our deepest longings.
• He has our best interests at heart and see the big picture.
• His answers are sometime, wait 
• And sometimes His answer is no, but we can trust that it is only because He has something better in mind for each of us.