Galatians 6:3

If a man think himself to be something - i.e. To be a proper Christian man; when he is nothing; being destitute of that charity which beareth, hopeth, and endureth all things. See 1 Corinthians 13:1, etc. Those who suppose themselves to excel all others in piety, understanding, etc., while they are harsh, censorious, and overbearing, prove that they have not the charity that thinketh no evil; and in the sight of God are only as sounding brass and a tinkling cymbal. There are no people more censorious or uncharitable than those among some religious people who pretend to more light and a deeper communion with God. They are generally carried away with a sort of sublime, high sounding phraseology, which seems to argue a wonderfully deep acquaintance with Divine things; stripped of this, many of them are like Samson without his hair.

For if a man think himself to be something ... - see Galatians 5:26. This is designed, evidently, to be another reason why we should be kind and tender to those who have erred. It is, that even those who are most confident may fall. They who feel secure, and think it impossible that they should sin, are not safe. They may be wholly deceived, and may be nothing, when they have the highest estimate of themselves. They may themselves fall into sin, and have need of all the sympathy and kindness of their brethren.

When he is nothing - When he has no strength, and no moral worth. When he is not such as he apprehends, but is lifted up with vain self-conceit.

He deceiveth himself - He understands not his own character. "The worst part of the fraud falls on his own head" - Doddridge. He does not accomplish what he expected to do; and instead of acquiring reputation from others, as he expected, he renders himself contemptible in their sight.

6:3 If any one think himself to be something - Above his brethren, or by any strength of his own. When he is nothing, he deceiveth himself - He alone will bear their burdens, who knows himself to be nothing.