Sexual pleasure, wisely used and not abused, may prove the stimulus and liberator of our finest and most exalted activities.

It is here [in mathematics] that the artist has the fullest scope of his imagination.

Failing to find in women exactly the same kind of sexual emotions, as they find in themselves, men have concluded that there are none there at all.

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.

I always seem to have a vague feeling that he is a Satan among musicians, a fallen angel in the darkness who is perpetually seeking to fight his way back to happiness.

The mother is the child's supreme parent.

The greatest task before civilization at present is to make machines what they ought to be, the slaves, instead of the masters of men.