Hebrews 13:8

Jesus Christ the same yesterday - In all past times there was no way to the holiest but through the blood of Jesus, either actually shed, or significantly typified. To-day - he is the lamb newly slain, and continues to appear in the presence of God for us. For ever - to the conclusion of time, he will be the way, the truth, and the life, none coming to the Father but through him; and throughout eternity, εις τους αιωνας, it will appear that all glorified human spirits owe their salvation to his infinite merit. This Jesus was thus witnessed of by your guides, who are already departed to glory. Remember Him; remember them; and take heed to yourselves.

Jesus Christ the same yesterday ... - As this stands in our common translation, it conveys an idea which is not in the original. It would seem to mean that Jesus Christ, the unchangeable Saviour, was the end or aim of the conduct of those referred to, or that they lived to imitate and glorify him. But this is by no means the meaning in the original. There it stands as an absolute proposition, that "Jesus Christ is the same yesterday, today, and forever;" that is, that he is unchangeable. The evident design of this independent proposition here is, to encourage them to persevere by showing that their Saviour was always the same; that he who had sustained his people in former times, was the same still, and would be the same forever. The argument here, therefore, for perseverance is founded on the "immutability" of the Redeemer. If he were fickle, vacillating, changing in his character and plans; if today he aids his people, and tomorrow will forsake them; if at one time he loves the virtuous, and at another equally loves the vicious; if he formed a plan yesterday which he has abandoned today; or if he is ever to be a different being from what he is now, there would be no encouragement to effort. Who would know what to depend on? Who would know what to expect tomorrow? For who could have any certainty that he could ever please a capricious or a vacillating being? Who could know how to shape his conduct if the principles of the divine administration were not always the same? At the same time, also, that this passage furnishes the strongest argument for fidelity and perseverance, it is an irrefragable proof of the divinity of the Saviour. It asserts immutability - sameness in the past, the present, and to all eternity but of whom can this be affirmed but God? It would not be possible to conceive of a declaration which would more strongly assert immutability than this.

13:8 Men may die; but Jesus Christ, yea, and his gospel, is the same from everlasting to everlasting.