And in this way He was then employed. For it is said, that He opened His mouth, and taught them. And wherefore is the clause added, He opened His mouth? To inform you that in His very silence He gave instruction, and not when He spoke only: but at one time by opening His mouth, at another uttering His voice by the works which He did.
But when you hear that He taught them, do not think of Him as discoursing with His disciples only, but rather with all through them.
For since the multitude was such as a multitude ever is, and consisted moreover of such as creep on the ground, He withdraws the choir of His disciples, and makes His discourse unto them: in His conversation with them providing that the rest also, who were yet very far from the level of His sayings, might find His lesson of self-denial no longer grievous unto them. Of which indeed both Luke gave intimation, when he said, that He directed His words unto them: and Matthew too, clearly declaring the same, wrote, His disciples came unto Him, and He taught them. For thus the others also were sure to be more eagerly attentive to Him, than they would have been, had He addressed Himself unto all.