Galatians 6:3
For if a man think himself to be something, when he is nothing, he deceiveth himself.
More from Galatians 6
Verse 1
Brethren, if a man be overtaken in a fault, ye which are spiritual, restore such an one in the spirit of meekness; considering thyself, lest thou also be tempted.
Verse 2
Bear ye one another's burdens, and so fulfil the law of Christ.
Verse 4
But let every man prove his own work, and then shall he have rejoicing in himself alone, and not in another.
Verse 5
For every man shall bear his own burden.