Acts 13:33

He then shews them that Jesus was their Messias, and the Son of God, begotten of his Father from eternity, who rose from the dead, and he applies these words, (Psalm ii. 7.) to prove Christ's resurrection, thou art my son, this day have I begotten thee. It is true, these words regard chiefly the eternal generation of Christ, as they are applied by St. Paul, (Hebrews v. 5.) but the resurrection was a necessary consequence of his divinity, since death could have no power over him. St. Paul here also proves Christ's resurrection by the following predictions. (Witham) --- Second psalm. The oldest copy reads, first psalm. The difference is merely in words; for the division of the psalter at present is very different from what it formerly was: sometimes a single psalm of ours being divided into many, and many of our divisions making only one, according to the Hebrews. The latter are not even now agreed among themselves on the same division of the psalms. (Calmet) --- Some suppose, that what we call the first psalm was originally looked upon as a preface to the psalter; others, that our first and second psalms united in one. (Mat. Polus.)