The following general definition of an animal: a system of different organic molecules that have combined with one another, under the impulsion of a sensation similar to an obtuse and muffled sense of touch given to them by the creator of matter as a whole, until each one of them has found the most suitable position for its shape and comfort.

Scepticism is the first step towards truth.

A nation which thinks that it is belief in God and not good law which makes people honest does not seem to me very advanced.

Gentleness and peacefulness regulate our proceedings; theirs are dictated by fury. We employ reason, they accumulate faggots. They preach nothing but love, and breathe nothing but blood. Their words are humane, but their hearts are cruel.

Distance is a great promoter of admiration.

Only the bad man is alone.

First move me, astonish me, break my heart, let me tremble, weep, stare, be enraged-only then regale my eyes.