Theory helps us to bear our ignorance of facts.

Even the most inspired verse, which boasts not without a relative justification to be immortal, becomes in the course of ages a scarcely legible hieroglyphic; the language it was written in dies, a learned education and an imaginative effort are requisite to catch even a vestige of its original force. Nothing is so irrevocable as mind.

Columbus gave the world another world.

Our dignity is not in what we do, but what we understand.

Self-assurance is contemptible and fatal unless it is self-knowledge.

It takes patience to appreciate domestic bliss; volatile spirits prefer unhappiness.

The highest form of vanity is love of fame.