Prayer is the most potential force in the world.  Not that prayer is anything, but rather that GOD IS EVERYTHING!! Prayer is the key that unlocks the door to the throne room of God. Prayer moves God.

James 5:15-16

"And the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him. Confess your faults one to another, and pray one for another, that ye may be healed. The effectual fervent prayer of a righteous man availeth much."

James 14:13

"And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son."

2 Chronicles 7:14

"If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land."

Phillipians 4:6-7
"Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known to God. And the peace of God, which passeth all understanding shall keep your hearts and minds through Jesus Christ."