I can't tell whether I am living in a dream or a nightmare.

Of all forms of caution, caution in love is perhaps the most fatal to true happiness.

It is permissible with certain precautions to speak in print of coitus, but it is not permissible to employ the monosyllabic synonym for this word.

The difficulty is old, but none the less real. An omnipotent being who created a world containing evil not due to sin must Himself be at least partially evil.

I did not, however, commit suicide, because I wished to know more of mathematics.

I think the subject which will be of most importance politically is Mass Psychology... Its importance has been enormously increased by the growth of modern methods of propaganda. Although this science will be diligently studied, it will be rigidly confined to the governing class. The populace will not be allowed to know how its convictions are generated.

Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.