In Luke 18 there are two stories that teach us a lot about prayer. The first one is found in verses 1-8.
Luke 18:1-8 NLT – One day Jesus told his disciples a story to show that they should always pray and never give up.  “There was a judge in a certain city,” he said, “who neither feared God nor cared about people.  A widow of that city came to him repeatedly, saying, ‘Give me justice in this dispute with my enemy.’  The judge ignored her for a while, but finally he said to himself, ‘I don’t fear God or care about people,  but this woman is driving me crazy. I’m going to see that she gets justice, because she is wearing me out with her constant requests!'”  Then the Lord said, “Learn a lesson from this unjust judge.  Even he rendered a just decision in the end. So don’t you think God will surely give justice to his chosen people who cry out to him day and night? Will he keep putting them off?  I tell you, he will grant justice to them quickly! But when the Son of Man returns, how many will he find on the earth who have faith?”
As I reflected on this story and in particular verse 7 where it says, “So don’t you think God will surely give justice to his chosen people who cry out to him day and night?” I realised there are five things we can learn about praying persistently.
1. Persistent prayer keeps us in constant communication with God and this helps build our relationship with Him.
2. Persistent prayer helps us keep our requests in perspective in light of this life and eternity.
3. Persistent prayer helps us to “fully rely on God” (F.R.O.G) because there are so many things in this life we are powerless to change.
4. Persistent prayer makes us consider what we really want God to do and the possible different ways He may answer our prayers.
5. Persistent prayer helps us recognise the answer when it comes and to be truly thankful when we see breakthrough.
Persistent prayer is about keeping our requests before Him, having an attitude of total reliance on and in Him and being thankful for when He brings the outcome.