Loyalty to petrified opinion never yet broke a chain or freed a human soul.

Mark Twain

I write differently from what I speak, I speak differently from what I think, I think differently from the way I ought to think, and so it all proceeds into deepest darkness.

Franz Kafka

Freedom does not mean being free of something, but to be free to do something.

Angela Merkel

The mind is not a vessel to be filled, but a fire to be kindled.

Plutarch

Make things as simple as possible but no simpler.

Albert Einstein

He who knows he has enough is rich. Perseverance is a sign of will power. He who stays where he is endures. To die but not to perish is to be eternally present.

Lao Tzu