In Luke 18:1-8, Jesus told a parable to the effect that his followers ought always to pray and not lose heart, which is a struggle we all face. He tells of an unrighteous judge who ends up doing the right thing because of a widow's persistence, and he reminds us that we are not dealing with an unrighteous judge, but a loving Father who created and saves us. In that we love, we are bold to pray!