John 14:24

24.He who loveth, me but keepeth not my words. As believers are mixed with unbelievers in the world, and as they must be agitated by various storms, as in a troubled sea, Christ again confirms them by this admonition, that they may not be drawn away by bad examples. As if he had said, “Do not look upon the world so as to depend on it; for there will always be some who despise me and my doctrine; but as for you, preserve constantly to the end the grace which you have once received.” Yet he likewise intimates that the world is justly punished for its ingratitude, when it perishes in its blindness, since, by despising true righteousness, it manifests a wicked hatred towards Christ.

And the word which you hear. That the disciples may not be discouraged or waver on account of the obstinacy of the world, he again procures credit to his doctrine, by testifying that it is from God, and that it was not contrived by men on the earth. And, indeed, the strength of our faith consists in our knowing that God is our leader, and that we are founded on nothing else than his eternal truth. Whatever then may be the rage and madness of the world, let us follow the doctrine of Christ, which rises far above heaven and earth. When he says that the word is not his, he accommodates himself to the disciples; as if he had said that it is not human, because he teaches faithfully what has been enjoined on him by the Father. Yet we know that, in so far as he is the eternal Wisdom of God, he is the only fountain of all doctrine, and that all the prophets who have been from the beginning spoke by his Spirit.