Romans 12:3, 16

For by the grace [of God] given to me I say to everyone of you not to think more highly of himself [and of his importance and ability] than he ought to think; but to think so as to have sound judgment, as God has apportioned to each a degree of faith [and a purpose designed for service].

Live in harmony with one another; do not be haughty [conceited, self-important, exclusive], but associate with humble people [those with a realistic self-view]. Do not overestimate yourself. [Prov 3:7]