For broad understanding and deep feeling, you need pain and suffering. I believe really great men must experience great sadness in the world.
FYODOR DOSTOEVSKY, Crime and Punishment
I've made people unhappy, but they've made me unhappy. The one cancels out the other.
AUGUST STRINDBERG, The Ghost Sonata
An unhappy person can never make others happy.
HARRIET BEECHER STOWE, Little Foxes
The sun does not shine upon this fair earth to meet frowning eyes, depend upon it.
CHARLES DICKENS, Nicholas Nickleby