"Men are so necessarily mad, that not to be mad would be to be a madman of another kind of madness."

"The greater the intelligence, the greater the capacity for suffering."

"All men's miseries derive from not being able to sit in a quiet room alone."

"We are so presumptuous that we wish to be known to all the world, even to those who will follow us when we are no more."

"We are usually convinced more easily by reasons we have discovered ourselves than by those found by others."