If you have had your attention directed to the novelties in thought in your own lifetime, you will have observed that almost all really new ideas have a certain aspect of foolishness when they are first produced, and almost any idea which jogs you out of your current abstractions may be better than nothing.

The foundations of the world are to be found, not in the cognitive experience of conscious thought, but in the aesthetic experience of everyday life.

Inventive genius requires pleasurable mental activity as a condition for its vigorous exercise

Wisdom alone is true ambition's aim, wisdom is the source of virtue and of fame; obtained with labour, for mankind employed, and then, when most you share it, best enjoyed.

Life is complex in its expression, involving more than percipience, namely desire, emotion, will, and feeling.

The whole of mathematics consists in the organization of a series of aids to the imagination in the process of reasoning.

Knowledge keeps no better than fish.