Unblest is he who thinks himself unblest.
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.
Some laws, though unwritten, are more firmly established than all written laws.
The way to good conduct is never too late.
Necessity is stronger than duty.
It is often better not to see an insult than to avenge it.