Hebrews 2:8

Heb. 2:8. Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing (that is) not put under him. But now we see not yet all things put under him.

Blank Bible comment:

[But now we see not yet all things put under Him.] In these words the apostle has respect to what he had said before verse 5 - signifying that it was the world to come or a certain future state of things wherein all things were to be subjected to Christ.

The Humble Attempt cites our text as an additional basis for promoting a world-wide union in prayer:

It is natural and reasonable to suppose, that the whole world should finally be given to Christ, as one whose right it is to reign, as the proper heir of him, who is originally the king of all nations, and the possessor of heaven and earth: and the Scripture teaches us, that God the Father hath constituted his Son, as God-man, and in his kingdom of grace, or mediatorial kingdom, to be "the heir of the world," that he might in this kingdom have "the heathen for his inheritance and the utmost ends of the earth for his possession," (Hebrews 1:2; Hebrews 2:8; Psalms 2:6-8.

The text is also put to use against Isaac Watts's notion of the pre-existence of Christ's human soul:

It is said, Hebrews 2:8, "Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing that is not put under him." Here it is represented, that God the Father has put every individual thing under the power and government of another person, distinct from himself. But this cannot be true of the human soul of Christ, as it must be according to Dr. Watts's scheme, let the powers of that be never so great, if they are not infinite. For things and circumstances, and dependencies and consequences of things in the world, are infinite in number; and therefore a finite understanding and power cannot extend to them: yea, it can extend to but an infinitely small part of the whole number of individuals, and their circumstances and consequences. Indeed, in order to the disposal of a few things in their motions and successive changes, to a certain precise issue, there is need of infinite exactness, and so need of infinite power and wisdom.

Heb. 2:9