Hebrews 2:8

Thou hast put all things in subjection ... - Psalm 8:6. That is, all things are put under the control of man, or thou hast given him dominion over all things.

For in that he put all in subjection - The meaning of this is, that the "fair interpretation" of the passage in the Psalm is, that the dominion of "man," or of human nature over the earth, was to be absolute and total. Nothing was to be excepted. But this is not now the fact in regard to man in general, and can be true only of human nature in the person of the Lord Jesus. There the dominion is absolute and universal." The point of the argument of the apostle may be this. It was the original appointment Genesis 1:26 that man should have dominion over this lower world, and be its absolute lord and sovereign. Had he continued in innocence, this dominion would have been entire and perpetual. But he fell, and we do not now see him exerting this dominion. What is said of the dominion of man can be true only of human nature in the person of the Lord Jesus, and there it is completely fulfilled.

But now we see not yet all things put under him - That is, "It is not now true that all things are subject to the control of man. There is indeed a general dominion over the works of God, and over the inferior creation. But the control is not universal. A large part of the animal creation rebels, and is brought into subjection only with difficulty. The elements are not entirely under his control; the tempest and the ocean rage; the pestilence conveys death through city and hamlet; the dominion of man is a broken dominion. His government is an imperfect government. The world is not yet put wholly under his dominion, but enough has been done to constitute a pledge that it will yet be done. It will be fully accomplished only in him who sustains our nature, and to whom dominion is given over the worlds."

2:8 Now this putting all things under him, implies that there is nothing that is not put under him. But it is plain, this is not done now, with regard to man in general.