Psalms 110:4 - Exposition

The Lord hath sworn, and he will not repent . "A fresh revelation" (Cheyne). David, admitted into the councils of the Most High, has been made aware that the Messiah is, by God's decree, to be both King and Priest. God has "sworn" this, and will certainly not draw back from his oath. Thou art a priest forever after the order of Melchizedek . Not, like ordinary priests, a priest for a few years, or for a lifetime, but a priest forever and ever ( לעולם )—seeing "he ever liveth to make intercession for us" ( Hebrews 7:25 ). And a priest "after the order of Melchizedek." Not, that is, after the order of Aaron, who was a priest and nothing more, but after that of Melchizedek, the elder priesthood, which combined the offices of priest and king (see Hebrews 5:6-10 ; Hebrews 7:1-10 , Hebrews 7:20-28 ).