To set up as a standard of public morality a notion which can neither be defined nor conceived is to open the door to every kind of tyranny.

A right which goes unrecognized by anybody is not worth very much.

The joy of learning is as indispensable in study as breathing is in running. Where it is lacking there are no real students, but only poor caricatures of apprentices who, at the end of their apprenticeship, will not even have a trade.

If we are suffering illness, poverty, or misfortune, we think we shall be satisfied on the day it ceases. But there too, we know it is false; so soon as one has got used to not suffering one wants something else.

In solitude we are in the presence of mere matter (even the sky, the stars, the moon, trees in blossom), things of less value (perhaps) than a human spirit. Its value lies in the greater possibility of attention.

Evil is neither suffering nor sin; it is both at the same time, it is something common to them both. For they are linked together; sin makes us suffer and suffering makes us evil, and this indissoluble complex of suffering and sin is the evil in which we are submerged against our will, and to our horror.

The lure of quantity is the most dangerous of all.