Self-conceit¹ may lead to self-destruction.

Aesop (620 BC - 560 BC), The Frog and the Ox

The smaller the mind the greater the conceit.

Aesop (620 BC - 560 BC)

When they discover the center of the universe, a lot of people will be disappointed to discover they are not it.

Bernard Bailey

Conceit is God's gift to little men.

Bruce Barton

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 (55 AD - 135 AD), Discourses²

The world tolerates conceit from those who are successful, but not from anybody else.

John Blake

An ostentatious man will rather relate a blunder or an absurdity³ he has committed, than be debarred from talking of his own dear person.

Joseph Addison (1672 - 1719)

We are so vain that we even care for the opinion of those we don't care for.

Marie Ebner von Eschenbach

For God hates utterly⁴

The bray⁵ of bragging⁶ tongues.

Sophocles (496 BC - 406 BC), Antigone

The greatest of faults, I should say, is to be conscious of none.

Thomas Carlyle (1795 - 1881)