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.

He is greedy of life who is not willing to die when the world is perishing around him.

One must steer, not talk.

The first step towards amendment is the recognition of error.

He who is brave is free.

Fortune's not content with knocking a man down; she sends him spinning head over heels, crash upon crash.

The worse a person is the less he feels it.