It is unreasonable to expect science to produce a system of ethics-ethics are a kind of highway code for traffic among mankind-and the fact that in physics atoms which were yesterday assumed to be square are now assumed to be round is exploited with unjustified tendentiousness by all who are hungry for faith; so long as physics extends our dominion over nature, these changes ought to be a matter of complete indifference to you.

Much of our highly valued cultural heritage has been acquired at the cost of sexuality.

When one does not have what one wants, one must want what one has.

The communal life of human beings had . . . a two-fold foundation: the compulsion to work, which was created by external necessity, and the power of love.

Experience teaches that for most people there is a limit beyond which their constitution cannot comply with the demands of civilization. All who wish to reach a higher standard than their constitution will allow, fall victims to neurosis. It would have been better for them if they could have remained less "perfect".

We know that the great majority of people have a strong need for authority which it can admire, to which it can submit, and which dominates and sometimes even ill-treats it.

America is the most grandiose experiment the world has seen, but, I am afraid, it is not going to be a success.