We cannot be sure that we ought not to regard the most criminal country as that which in some aspects possesses the highest civilization.

What we call 'morals' is simply blind obedience to words of command.

All civilization has from time to time become a thin crust over a volcano of revolution.

Birth-control is effecting, and promising to effect, many functions in our social life.

There is nothing more fragile than civilization.

The immense value of becoming acquainted with a foreign language is that we are thereby led into a new world of tradition and thought and feeling.

The second great channel through which the impulse towards the control of procreation for the elevation of the race is entering into practical life is by the general adoption, by the educated—of methods for the prevention of conception except when conception is deliberately desired.