Revolution is not the uprising against preexisting order, but the setting up of a new order contradictory to the traditional one

A revolution does not last more than fifteen years, the period which coincides with the flourishing of a generation.

A revolution only lasts fifteen years, a period which coincides with the effectiveness of a generation

We do not live to think, but, on the contrary, we think in order that we may succeed in surviving.

In order to master the unruly torrent of life the learned man meditates, the poet quivers, and the political hero erects the fortress of his will.

The difficulties which I meet with in order to realize my existence are precisely what awaken and mobilize my activities, my capacities.