It is never too late to become reasonable and wise.

A science of all these possible kinds of space [the higher dimensional ones] would undoubtedly be the highest enterprise which a finite understanding could undertake in the field of geometry... If it is possible that there could be regions with other dimensions, it is very likely that God has somewhere brought them into being.

If we knew that god exists, such knowledge would make morality impossible. For, if we acted morally from fear or fright, or confident of a reward, then this would not be moral. It would be enlightened selfishness.

An action is essentially good if the motive of the agent be good, regardless of the consequences.

How then is perfection to be sought? Wherein lies our hope? In education, and in nothing else.

We can judge the heart of a man by his treatment of animals.

Notion without intuition is empty, intuition without notion is blind.