If ye had known me
Christ having made mention of his Father's house, and of himself, as the way thither, and the way of access to the Father, was willing to inform his disciples better concerning him before his departure from them, which he introduces, saying: "if ye had known me"; that is, more fully and perfectly; for that they knew Christ to be the Son of God, the Saviour of the world, and true Messiah, is certain, though they were not so thoroughly acquainted, as afterwards, with his person, power, and office:
ye should have known my Father also;
for the knowledge of the Father, and of Christ, go together; he that sees the one, sees the other; he that believes in the one, believes in the other; and the knowledge of both is necessary to eternal life; and as a person increases in the knowledge of the one, so of the other. The disciples had some knowledge of them both, but what was very small and obscure, in comparison of what they afterwards had:
and from henceforth ye know him, and have seen him;
some read these words, "henceforwards ye shall know him, and see him"; that is, in a very short time, when the Spirit is poured down from on high upon you, and you have received the gifts of the Holy Ghost, you shall then have an enlarged knowledge both of me and my Father. Others render them, as an exhortation, "henceforward know ye him"; acknowledge the Father in all that I have done, believing that you see the Father in me, and in all my works; though they are rather to be considered as an assertion, declaring, that they then had some knowledge of the Father; "and now ye know him, and", or "because ye have seen him"; in me, who am "the brightness of his glory, and the express image of his person".