Mathematics rightly viewed possesses not only truth but supreme beauty.

Collective fear stimulates herd instinct, and tends to produce ferocity toward those who are not regarded as members of the herd.

It is essential to happiness that our way of living should spring from our own deep impulses and not from the accidental tastes and desires of those who happen to be our neighbors, or even our relations.

If one lived for ever the joys of life would inevitably in the end lose their savour. As it is, they remain perennially fresh.

People are zealous for a cause when they are not quite positive that it is true.

All the time that he can spare from the adornment of his person, he devotes to the neglect of his duties.

Awareness of universals is called conceiving, and a universal of which we are aware is called a concept.