Great people plant trees they'll never sit under.

Without adventure civilization is in full decay. ... The great fact [is] that in their day the great achievements of the past were the adventures of the past.

Dogmatism is the anti-Christ of learning.

When success turns a man's head he faces failure

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.

No religion can be considered in abstraction from its followers, or even from its various types of followers.

Education which is not modern share the fate of all organic things which are kept too long.