1 Peter 1:23

Christian brotherhood flows from our new birth of an imperishable seed, the abiding word of God. This is the consideration urged here to lead us to exercise brotherly love. As natural relationship gives rise to natural affection, so spiritual relationship gives rise to spiritual, and therefore abiding love, even as the seed from which it springs is abiding, not transitory as earthly things. of . . . of . . . by--"The word of God" is not the material of the spiritual new birth, but its mean or medium. By means of the word the man receives the incorruptible seed of the Holy Spirit, and so becomes one "born again": Joh 3:3-5, "born of water and the Spirit": as there is but one Greek article to the two nouns, the close connection of the sign and the grace, or new birth signified is implied. The word is the remote and anterior instrument; baptism, the proximate and sacramental instrument. The word is the instrument in relation to the individual; baptism, in relation to the Church as a society (Jam 1:18). We are born again of the Spirit, yet not without the use of means, but by the word of God. The word is not the beggeting principle itself, but only that by which it works: the vehicle of the mysterious germinating power [ALFORD]. which liveth and abideth for ever--It is because the Spirit of God accompanies it that the word carries in it the germ of life.

— Jamieson-Fausset-Brown Commentary (public domain)