One can think effectively only when one is willing to endure suspense and to undergo the trouble of searching.

Thinking is the accurate and deliberate instituting of connections between what is done and its consequences.

In England, philosophers are honoured, respected; they rise to public offices, they are buried with the kings... In France warrants are issued against them, they are persecuted, pelted with pastoral letters: Do we see that England is any the worse for it?

What accumulated knowledge exists in low grade societies is at least put into practice; it is transmuted into character; it exists with the depth of meaning that attaches to its coming within urgent daily interests.

Teachers are the agents through which knowledge and skills are communicated and rules of conduct enforced.

Mankind likes to think in terms of extreme opposites.

The need for growth, for development, for change, is fundamental to life.