"The more perfect a being is, the more it suffers."

"The animal enjoys the present, man is tormented by the future."

"The world is a prison in which solitary confinement is preferable."

"The best thing a man can do is to remain a bachelor."

"We can come to look upon the deaths of our enemies with as much regret as we feel for those of our friends, namely, when we miss their existence as witnesses to our success."