James 5:16 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.
Great men in the bible were ordinary men, used by God in an extraordinary way. The common denominator is always a close relationship with the Lord. Victory in the Christian life is won not through our own strength, but by moving God through an effective and fervent prayer life.