Galatians 6:3

For if a man think himself to be something, when he is nothing, he deceiveth himself.
— Galatians 6:3, King James Version

In other translations

World English Bible (WEB)

For if a man thinks himself to be something when he is nothing, he deceives himself.

American Standard Version (ASV)

For if a man thinketh himself to be something when he is nothing, he deceiveth himself.

Young's Literal Translation (YLT)

for if any one doth think <FI>himself<Fi> to be something--being nothing--himself he doth deceive;