Unblest is he who thinks himself unblest.

Ignorance is the cause of fear.

The friends of the unfortunate live a long way off.

The pressure of adversity does not affect the mind of the brave man. It is more powerful than external circumstances.

A single lifetime, even though entirely devoted to the sky, would not be enough for the study of so vast a subject. A time will come when our descendants will be amazed that we did not know things that are so plain to them.

I never come back home with the same moral character I went out with; something or other becomes unsettled where I had achieved internal peace; some one or other of the things I had put to flight reappears on the scene.

The tempest threatens before it comes; houses creak before they fall.