The vanity of intelligence is that the intelligent man is often more committed to 'one-upping' his opponent than being truthful. When the idea of intelligence, rather than intelligence itself, becomes a staple, there is no wisdom in it.

The only thing more dangerous than ignorance is the pretense of intelligent ignorance. The former is teachable; the latter is not.

Cleverness isn't always true nor is the truth always clever.

Whenever we want to combat our enemies, first and foremost we must start by understanding them rather than exaggerating their motives.

The only sort of pride that may serve a man well on that rarest occasion is his hatred of being wrong. It keeps his mouth shut, his ears open, and his research extensive. And yet this is also the deadliest because when he is in fact proven wrong, he absolutely refuses to acknowledge it. It then keeps his mouth open, his ears shut, and his research inexistent.

A sign of a lover of wisdom is his delight in not running his mouth about things he doesn't know.