What can we say with certainty?
Anyone who has the power to make you believe absurdities has the power to make you commit injustices.
Men will always be mad, and those who think they can cure them are the maddest of all.
What is tolerance? It is the consequence of humanity. We are all formed of frailty and error; let us pardon reciprocally each other's folly - that is the first law of nature.
There are no sects in geometry.
Life is bristling with thorns, and I know no other remedy than to cultivate one's garden.