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

To make a mountain out of a mole-hill.

The relation of the individual person to the species he belongs to is the most intimate of all relations.

Sex lies at the root of life, and we can never learn to reverence life until we know how to understand sex.

The largely objective character of beauty is further indicated by the fact that to a considerable extent beauty is the expression of health. A well and harmoniously developed body, tense muscles, an elastic and finely toned skin, bright eyes, grace and animation of carriage- all these things which are essential to beauty are the conditions of health.

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

A sublime faith in human imbecility has seldom led those who cherish it astray.