When a man is willing to set aside the legitimate appetites of the body to concentrate on the work of praying, he is demonstrating that he means business, that he is seeking with all his heart, and will not let God go unless He answers.
Strange though it may seem, there are distinct similarities between the ways of God in revival and in judgment... Because of His very nature, God cannot and will not permit spiritual decline to continue unchecked. He is ever halting and reversing the trend of the times by means of revival - or judgment. Where His people are not prepared for the one, they shut themselves up to the other.
Fasting is calculated to bring a note of urgency and importance into our praying, and to give force to our pleading in the court of heaven. The man who prays with fasting is giving heaven notice that he is truly in earnest.