John 12:30

(Tr. lii. 5) i. e. It did not come to tell Him what He knew already, but them what they ought to know. And as that voice did not come for His sake, but for theirs, so His soul was not troubled for His sake, but for theirs.

"This Voice came not because of Me, but for your sakes." They thought that it thundered, or that an Angel spake to Him. And how did they think this? Was not the voice clear and distinct? It was, but it quickly flew away from them as being of the grosser sort, carnal and slothful. And some of them caught the sound only, others knew that the voice was articulate, but what it meant, knew not. What saith Christ? "This Voice came not because of Me, but for your sakes." "Not that I may learn by it anything of which I am ignorant, (for I know all that belongeth to the Father,) but for your sakes." For when they said, "An Angel hath spoken unto Him," or "It hath thundered," and gave not heed to Him, He saith, "it was for your sakes," that even so ye might be led to enquire what the words meant.

Far be it from us to imagine vicissitudes of bodily change in the Father and Son, as though the Father sometimes spoke to the Son, and sometimes was silent. We remember, indeed, that a voice was sometimes uttered from heaven for us, that the power of the Father's words might confirm for us the mystery of the Son, as the Lord says, This voice hath not come from Heaven for My sake but for your sakes. But the divine nature can dispense with the various combinations necessary for human functions, the motion of the tongue, the adjustment of the mouth, the forcing of the breath, and the vibration of the air. God is a simple Being: we must understand Him by devotion, and confess Him by reverence. He is to be worshipped, not pursued by our senses, for a conditioned and weak nature cannot grasp with the guesses of its imagination the mystery of an infinite and omnipotent nature.