Virtue is a state of war, and to live in it we have always to combat with ourselves. - Jean-Jacques Rousseau

Why should we build our happiness on the opinons of others, when we can find it in our own hearts?

Man’s first language, the most universal, the most energetic and the only language he needed before it was necessary to persuade men assembled together, is the cry of nature.

Astronomy was born of superstition, eloquence of ambition, hatred, falsehood and flattery; geometry of avarice; physics of an idle curiosity; and even moral philosophy of human pride. Thus the arts and sciences owe their birth to our vices