yet are never said to be begotten by him; or, with this clause annexed to it, "this day have I begotten thee"; nor are they ever so called in a proper sense, or in such sense as Christ is: this is said to Christ, and of him, in Ps 2:7 and that agreeably to the sense of the Jewish church at this time, or the apostle would never have produced it to the Hebrews in such a manner; and not only the whole psalm in general, but this verse in particular, is owned by Jewish writers , both ancient and modern, to belong to the Messiah.
Christ is the Son of God, not by Creation, nor by adoption, nor by office, but by nature; he is the true, proper, natural, and eternal Son of God; and as such is owned and declared by Jehovah the Father, in these words; the foundation of which relation lies in the begetting of him; which refers not to his nature, either divine or human: not to his divine nature, which is common with the Father and Spirit; wherefore if his was begotten, theirs must be also, being the same undivided nature, common to all three; much less to his human nature, in which he is never said to be begotten, but always to be made, and with respect to which he is without Father; nor to his office, as Mediator, in which he is not a Son, but a servant; besides, he was a Son, previous to his being a prophet, priest, and King; and his office is not the foundation of his sonship, but his sonship is the foundation of his office; or by which that is supported, and which fits him for the performance of it: but it has respect to his divine person; for as, in human generation, person begets person, and like begets like, so it is in divine generation; though care must be taken to remove all imperfection from it, as divisibility and multiplication of essence, priority and posteriority, dependence, and the like; nor can the modus, or manner of it, be conceived, or explained by us: the date of it, today, designs eternity, as in Isa 43:13, which is one continued day, an everlasting now; and this may be applied to any time and case, in which Christ is declared to be the Son of God; as at his incarnation, his baptism, his transfiguration on the Mount, and his resurrection from the dead, as in Ac 13:33 and at his ascension to heaven, when he was made Lord and Christ, and his divine sonship more manifestly appeared; which seems to be the time, and case, more especially referred to here.
And again, I will be to him a father, and he shall be to me a Son: which words are taken from 2Sa 7:14 and the sense is, not that he should be his son by adoption; or that he would be instead of a father to him; or that he should be as dear to him as a son is to a father; but that he was really and properly so; and he would make it manifest, and own him as such, as he did at Jordan's river, upon the Mount, and at his resurrection and ascension; though the words are spoken of Solomon, as a type of Christ, they properly belong to the antitype, who is greater than Solomon.
Zohar in Numb. fol. 82. 2. Maimon. in Misn. Sanhedrin, c. 11. 1. & Abarbinel, Mashmia Jeshua, fol. 37. 4. & 38.