We no longer love our knowledge enough once we have passed it on.

We have arranged for ourselves a world in which we can live - by positing bodies, lines, planes, causes and effects, motion and rest, form and content; without these articles of faith nobody could now endure life. But that does not prove them. Life is no argument. The conditions of life might include error.

Love, too, has to be learned.

The rights which a man arrogates to himself are relative to the duties which he sets himself, and to the tasks which he feels capable of performing.

One thing a man must have: either a naturally light disposition or a disposition lightened by art and knowledge.

The advantage of a bad memory is that one enjoys several times the same good things for the first time.

We labour at our daily work more ardently and thoughtlessly than is necessary to sustain our life because it is even more necessary not to have leisure to stop and think. Haste is universal because everyone is in flight from himself.