For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son?
Ver. 5. This day] Either the day of eternity, and so it is meant of Christ's eternal generation; or else the fulness of time, wherein God brought his first begotten into the world, and mightily declared him to be the Son of God by the resurrection from the dead, Acts 13:33; Romans 1:4 .
I will be to him a Father, and he shall be to me a Son] αυτοθεος. The second person is of himself, as God; of his Father, as a Son; because the Father communicateth to him his own nature, and that by generation; whence he is called "his begotten Son;" and his "only begotten;" because by generation God hath no more sons ‘out him; he is called the "Father of spirits," Hebrews 12:9; of all men,Malachi 2:10, as he is Creator and conserver of all; and of "all good men," by the grace of adoption and regeneration,2 Corinthians 6:18; John 1:12 .