Many people expected God to answer their prayers immediately. In order to stress the importance of patience in praying to God, Jesus taught a parable about a persistent widow petitioning a judge. God does not count time as man does, so man must not lose heart if he fails to receive certain blessings when he expects them.
If this ungodly judge had given the widow justice from her adversary, how much more will the righteous God reward a person’s persistence if he continues to ask Him? When the time is right, He will be speedy in His response.