A fool with a heart and no sense is just as unhappy as a fool with sense and no heart.
Man is unhappy because he doesn't know he's happy. If anyone finds out he'll become happy at once.
It is always so, when we are unhappy we feel more strongly the unhappiness of others; our feeling is not shattered, but becomes concentrated...
It is better to be unhappy and know the worst, than to be happy in a fool's paradise.