“I will declare the decree: the LORD hath said unto me, Thou art my Son; this day have I begotten thee.”
King James Version (KJV)
2:7 The decree - The will and appointment of God concerning this. My sin - Which tho' it may in some sort be said to, or of David, yet much more properly belongs to Christ, who is commonly known by this title both in the Old and New Testament, and to whom this title is expressly appropriated by the holy ghost, who is the best interpreter of his own words, #Acts 13:33 Heb 1:5|. This day - This may be understood either, Of his eternal generation. This day, from all eternity, which is well described by this day, because in eternity there is no succession, no [yesterday,] no [tomorrow,] but it is all as one continued day or moment without change or flux; or, Of the manifestation of Christ's eternal son - ship in time; which was done both in his birth and life, when his being the son of God was demonstrated by the testimony of the angel, #Luke 1:32|, and of God the Father, #Matt 3:17 17:5|, and by his own words and works; and in his resurrection, which seems to be here mainly intended, of which day this very place is expounded, #Acts 13:33|. When Christ was in a most solemn manner declared to be the son of God with power, #Rom 1:4|.