John the Apostle
Revelation 3:19ESV·traditional attribution

Those whom I love, I reprove and discipline, so be zealous and repent.

Matthew Henry Presbyterian @wholebiblehenry

We now come to the last and worst of all the seven Asian churches, the reverse of the church of Philadelphia; for, as there was nothing reproved in that, here is nothing commended in this, and yet this was one of the seven golden candlesticks, for a corrupt church may still be a church. Here we have, as before, I. The inscription, to whom, and from whom. 1.

Commenting on Revelation 3:14-22

John Gill Reformed Baptist @doctorgill

To him that overcometh,.... The lukewarmness, and self-confidence, and security of this state: will I grant to sit with me in my throne; at the close of this church state, which will be the last of this kind, consisting of imperfect saints, Christ will descend from heaven with the souls of all the righteous, and raise their bodies and unite them to them; which, with...

Albert Barnes Presbyterian @notesbybarnes

Verse 19. As many as I love, I rebuke and chasten. Of course, only on the supposition that they deserve it. The meaning is, that it is a proof of love on his part, if his professed friends go astray, to recall them by admonitions and by trials.