Again, it may be seen from this promise that God, to some extent, has seen fit to condition His action upon the believer’s prayer; for the Scripture says; “If ye shall ask anything in my name, I will do it”; and this is the secret of all true evangelism.… It is, then, the teaching of Scripture that the action of the mighty power of God in convicting and illuminating the unsaved is also, in a large measure, dependent upon the priestly intercession of the believer.

L. S. Chafer, True Evangelism, pp. 90-1