Of all affairs, communication is the most wonderful.

We do not learn from experience... we learn from reflecting on experience.

Complete adaptation to environment means death. The essential point in all response is the desire to control environment.

Faith in the possibilities of continued and rigorous inquiry does not limit access to truth to any channel or scheme of things. It does not first say that truth is universal and then add there is but one road to it.

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

Nature is the mother and the habitat of man, even if sometimes a stepmother and an unfriendly home.