Smoking is indispensable if one has nothing to kiss.

We believe that civilization has been created under the pressure of the exigencies of life at the cost of satisfaction of the instincts.

History is just new people making old mistakes.

A piece of creative writing, like a day-dream, is a continuation of, and a substitute for, what was once the play of childhood.

As regards intellectual work it remains a fact, indeed, that great decisions in the realm of thought and momentous discoveries and solutions of problems are only possible to an individual, working in solitude.

No other technique for the conduct of life attaches the individual so firmly to reality as laying emphasis on work; for his work at least gives him a secure place in a portion of reality, in the human community.

It must be pointed out, however, that strictly speaking it is incorrect to talk of the dominance of the pleasure principle over the course of mental processes. If such a dominance existed, the immense majority of our mental processes would have to be accompanied by pleasure or to lead to pleasure, whereas universal experience completely contradicts any such conclusion.