John the Apostle
1 John 2:28BSB·traditional attribution

And now, little children, remain in Christ, so that when He appears, we may be confident and unashamed before Him at His coming.

John Calvin Reformed @genevareformer

He at the same time shews, that the children of God are for no other end illuminated by the Spirit, but that they may know Christ. Provided they turned not aside from him, he promised them the fruit of perseverance, even confidence, so as not to be ashamed at his presence.

Matthew Henry Presbyterian @wholebiblehenry

From the blessing of the sacred unction the apostle proceeds in his advice and exhortation to constancy in and with Christ: And now, little children, abide in him, Jo1 2:28. The apostle repeats his kind appellation, little children, which I suppose does not so much denote their diminutiveness as his affection, and therefore, I judge, may be rendered dear children.

Commenting on 1 John 2:28-29

John Gill Reformed Baptist @doctorgill

And now, little children, abide in him,.... The apostle having finished his separate instructions exhortations to the fathers, young men and children, returns to the whole body of the saints in general, whom he addresses, as in 1Jo_2:1; under the name of little children; See Gill on Jo1 2:1; and whom he exhorts to abide in Christ, that is, in the exercise of faith on...