Philosophy starts with doubt and loves only truth.

A microscopic phantom of the universe; this is all that we are able to be.

It is by teaching that we teach ourselves, by relating that we observe, by affirming that we examine, by showing that we look, by writing that we think, by pumping that we draw water into the well.

The laws of animality govern almost the whole of history.

Every situation is an equilibrium of forces; every life is a struggle between opposing forces working within the limits of a certain equilibrium

Man is saved by love and duty, and by the hope that springs from duty, or rather from the moral facts of consciousness, as a flower springs from the soil.

To live we must conquer incessantly, we must have the courage to be happy.