The Apostle Paul
Galatians 6:3BSB·traditional attribution

If anyone thinks he is something when he is nothing, he deceives himself.

John Calvin Reformed @genevareformer

3. For if a man think himself. There is an ambiguity in the construction, but Paul’s meaning is clear. The phrase, When he is nothing, appears at first view to mean, “if any person, who is in reality nothing, claims to be something;” as there are many men of no real worth who are elated by a foolish admiration of themselves.

Matthew Henry Presbyterian @wholebiblehenry

The apostle having, in the foregoing chapter, exhorted Christians by love to serve one another (Gal 6:13), and also cautioned us (Gal 6:16) against a temper which, if indulged, would hinder us from showing the mutual love and serviceableness which he had recommended, in the beginning of this chapter he proceeds to give some further directions, which, if duly observed, would both promote the one...

Commenting on Galatians 6:1-10

John Gill Reformed Baptist @doctorgill

For if a man think himself to be something,.... Of himself; to have anything of himself, to do anything of himself, and of himself to attain to life and salvation: when he is nothing: of himself; not even as a creature, but owes his being and preservation, and all the mercies of life, to another, even to God; has no grace nor gifts of himself...