Barnes New Testament Notes

Verse 44. The Lord said, etc. This is the language of David. "Jehovah said unto my Lord" -- the Messiah -- " Sit thou," etc. This was a prediction respecting the exaltation of Christ. To be raised to the right hand of a king was significant of favor, trust, and power. See Barnes "Mt 20:21".

This was done respecting Christ, Mr 16:19; Ac 7:55; Ro 8:34; Eph 1:20; Heb 1:3; Heb 8:1; 10:12.

Thine enemies thy footstool. A footstool is that which is under the feet when we are sitting -- implying that we have it under subjection, or at our control. So he shall put all enemies under his feet -- all his spiritual foes -- all that rise up against him, Ps 2:9,12 Heb 10:13; 1 Co 15:25.