One cannot learn so well as by experiencing it oneself.

It is just as important to make knowledge live and keep it alive as to solve specific problems.

The world we have created is a product of our thinking.

The value of a college education is not the learning of many facts but the training of the mind to think

You must be aware that most men (and also not only a few women) are by nature not monogamous. This nature makes itself even more forceful when tradition and circumstance stand in an individual's way.

I have never belonged wholeheartedly to a country, a state, nor to a circle of friends, nor even to my own family. When I was still a rather precocious young man, I already realized most vividly the futility of the hopes and aspirations that most men pursue throughout their lives. Well-being and happiness never appeared to me as an absolute aim. I am even inclined to compare such moral aims to the ambitions of a pig.

I always found I was in the best of company, alone.