Galatians 6:3 in the World English Bible
For if a man thinks himself to be something when he is nothing, he deceives himself.
Context
2 Bear ye one another’s burdens, and so fulfil the law of Christ.
3 For if a man think himself to be something, when he is nothing, he deceiveth himself.
4 But let every man prove his own work, and then shall he have rejoicing in himself alone, and not in another.