Common sense is calculation applied to life.

To feel keenly the poetry of a morning's roses, one has to have just escaped from the claws of this vulture which we call sickness.

Man is a willful and covetous animal, who makes use of his intellect to satisfy his inclinations, but who cares nothing for truth, who rebels against personal discipline, who hates disinterested thought and the idea of self-education. Wisdom offends him, because it rouses in him disturbance and confusion, and because he will not see himself as he is.

Happiness gives us the energy which is the basis of health.

Let mystery have its place in you ; do not be always turning up your whole soil with the ploughshare of self-examination, but leave a little fallow corner in your heart ready for any seed the winds may bring.

Time is but the measure of the difficulty of a conception. Pure thought has scarcely any need of time, since it perceives the two ends of an idea almost at the same moment.

If nationality is consent, the state is compulsion.