...happiness gives us the energy which is the basis of health.
A belief is not true because it is useful.
A lively, disinterested, persistent looking for truth is extraordinarily rare. Action and faith enslave thought, both of them in order not to be troubled or inconvenienced by reflection, criticism or doubt.
Action is only coarsened thought-thought becomes concrete, obscure, and unconscious.
All appears to change when we change.
An error is the more dangerous the more truth it contains.
Charm is the quality in others that makes us more satisfied with ourselves.
Conquering any difficulty always gives one a secret joy, for it means pushing back a boundary-line and adding to one's liberty.
Doing easily what others find difficult is talent doing what is impossible for talent is genius.
Doubt of the reality of love ends by making us doubt everything.