Then Jesus told his disciples a parable to show them that they should always pray and not give up. 
Luke 18:1 NIV

God knows that some days we feel like giving up on prayer. Maybe we think that there are bigger problems in the world or that God isn’t interested. Yet, instead of just lecturing us, Jesus tells us a story about a widow and a judge. This widow wasn’t politically connected, or rich and she had an someone harassing her. We aren’t told exactly the issue: only that the one person she could turn to for help was a corrupt judge. Yet she didn’t give up, run away, or complain to her neighbors. Instead, every morning she walked down to the judge’s house. I can just picture him looking out his window, as he heard her knock, muttering, “Oh no! Not her again!”

Maybe she was driving him crazy, but all she really wanted was for him to do his job. Finally, the judge threw up his hands, and said something like, “All right! I’ll do it! Just please leave me alone!” Then, Jesus reminds us that God is not even a little bit like that judge. God wants to hear our prayers. God loves us, wants the best for us, and since He is so good, we should never give up. God is listening, and if we keep on praying and believing, we can trust that one day He is sure to answer!

“I have abandoned all particular forms of devotion, all prayer techniques. My only prayer practice is attention. I carry on a habitual, silent, and secret conversation with God that fills me with overwhelming joy.” 
Brother Lawrence