Great things are accomplished when we talk to someone with power.   When I pray to God, I talk to someone who has the greatest power of all.  God has the power to create the world from nothing (Genesis 1:1-33).  God has the power to part the Red Sea, allowing Moses and the others to cross on dry ground (Exodus 14:21).  God has the power to cause the walls of Jericho to fall (Joshua 6:20).  God has the power to enable David, while only a young boy, to overcome Goliath, a mighty giant (I Samuel 17:1-51).  God has the power to raise the dead (I Kings 17:17-22).  God has the power to enable the blind to see and the lame to walk (Matthew 11:4-5). When I talk to God in prayer, I talk to someone with great power.  And because of that, I know prayer will bring great results.