John Lightfoot on John 14:6

[I am the way, the truth, and the life.] Why is this superadded of truth and the life, when the question was only about the way?

I. It may be answered that this was perhaps by a Hebrew idiosyncrasy; by which the way, the truth, and the life, may be the same with the true and living way.

Jeremiah 29:11: To give you an end and hope, or expectation: that is, a hoped or expected end. So Kimchi in loc.; "A good end even as you expect."

II. Our Saviour seems to refute that opinion of the Jews concerning their law, as if it were the way, the truth, and the life, and indeed every thing: and to assert his own authority and power of introducing a new rule of religion, because himself is the way, the truth, and the life, in a sense much more proper and more sublime than the law could be said to be.

It had been happier for the Jew if he could have discerned more judiciously concerning the law; if he could have distinguished between coming to God in the law and coming to God by the law: as also between living in the law and living by the law. It is beyond all doubt, there is no way of coming to God but in his law: for what outlaw, or one that still wanders out of the paths of God's commandments, can come unto him? So also it is impossible that any one should have life but in the law of God. For who is it can have life that doth not walk according to the rule of his laws? But to obtain admission to the favour of God by the law, and to have life by the law; that is, to be justified by the works of the law; this sounds quite another thing: for it is by Christ only that we live and are justified; by him alone that we have access to God.

These are the fictions of the Rabbins: "There was one shewed a certain Rabbin the place where Corah and his company were swallowed up, and, 'Listen,' saith he, 'what they say.' So they heard them saying, Moses and his law are the truth. Upon the calends of every month hell rolls them about, as flesh rolls in the caldron, hell still saying, Moses and his law are truth."

It is, indeed, a great truth, what is uttered in this most false and ridiculous legend, that "the law of Moses is truth." But the Jews might (if they would) attain to a much more sound way of judging concerning the truth of it, and consider that the law is not the sum and ultimate of all truth, but that Christ is the very truth of the truth of Moses: John 1:17, "The law was given by Moses, but grace and truth came by Jesus Christ."