'Give the fulness of.' It is not to fulfil a command in the way of obedience, nor to complete another thing by adding to it; but to fill up some system sketched out, or that which is expressed in the thing fulfilled, as a whole. Thus the doctrine of the Church completed the word of God, made full what was expressed by it. Christ does not here fulfil what is said, nor add to what still remained and was perfect itself; but came to make good the whole scope of law and prophets. The passage has nothing to do with obeying the law. Nor is it here accomplishing a particular prophecy. He comes as the revealed completeness of God's mind, whatever the law and the prophets had pointed out. Verse 18 forbids the sense of obedience as not to be maintained, though 19 proves that he was to be condemned who, being under law, broke the commandments spoken of. But this is a consequence; Christ speaks of their authority. All was to be fulfilled in some way or another, not set aside.