Noun
Conceit of one's self; an overweening opinion of one's powers or endowments.
Source: Webster's dictionarySelf-conceit may lead to self destruction. Aesop
Whenever nature leaves a hole in a person's mind, she generally plasters it over with a thick coat of self-conceit. Henry Wadsworth Longfellow
What is the first business of one who practices philosophy? To get rid of self-conceit. For it is impossible for anyone to begin to learn that which he thinks he already knows. Epictetus
Love, when it is ours, is the other name for self-abnegation and sacrifice. When it belongs to people across the airshaft it means arrogance and self-conceit. O. Henry
Self-conceit is the enemy of progress. Bion of Borysthenes
Self-conceit may lead to self-destruction. American Proverb