"It is better to be unhappy and know the worst, than to be happy in a fool's paradise."

"Man is unhappy because he doesn't know he's happy; it's only that. Whoever learns it will be happy at once, that instant."

"What is a friend? A single soul dwelling in two bodies."

"Nothing is easier than to denounce the evildoer; nothing is more difficult than to understand him."

"Much unhappiness has come into the world because of bewilderment and things left unsaid."