Man lives between the infinitely large and the infinitely small.

Small minds are concerned with the extraordinary, great minds with the ordinary.

The sensitivity of men to small matters, and their indifference to great ones, indicates a strange inversion.

What part of us feels pleasure? Is it our hand, our arm, our flesh, or our blood? It must obviously be something immaterial.

Man's greatness lies in his power of thought.

Let man then contemplate the whole of nature in her full and grand majesty... No idea approaches it. We may enlarge our conceptions beyond all imaginable space; we only produce atoms in comparison with the reality of things. It is an infinite sphere, the center of which is everywhere, the circumference nowhere.

If man were happy, he would be the more so, the less he was diverted, like the saints and God.