A. W. Tozer

. . . we are forever asking God to do things that He either has already done or cannot do because of our unbelief. We plead for Him to speak when He has already spoken and is at that very moment speaking. We ask Him to come when He is already Present and waiting for us to recognize Him. We beg the Holy Spirit to fill us while all the time we are preventing Him by our doubts.

– A. W. Tozer