No path leads from a knowledge of that which is to that which should be.

Dr. Einstein: Yes; But this year the answers are different.

It is nothing short of a miracle that modern methods of teaching have not yet entirely strangled that sacred spirit of curiosity and inquiry, for this delicate plant needs freedom no less than stimulation.

If one asks the whence derives the authority of fundamental ends, since they cannot be stated and justified merely by reason, one can only answer: they exist in a healthy society as powerful traditions, which act upon the conduct and aspirations and judgments of the individuals; they are there, that is, as something living, without its being necessary to find justification for their existence.

You cannot prevent and prepare for war at the same time.

How vile and despicable war seems to me! I would rather be hacked to pieces than take part in such an abominable business.

Live with purpose. Don't let people or things around you get you down.