Kahlil Gibran

Some of you say, “Joy is greater than sorrow,” and others say, “Nay, Sorrow is the greater.” But I say unto you, they are inseparable.

Together they come, and when one sits alone with you at your board, remember that the other is asleep upon your bed.

Verily you are suspended like scales between your sorrow and your joy. Only when you are empty are you at a standstill and balanced. When the treasure-keeper lifts you to weigh his gold and his silver, your joy or your sorrow must necessarily rise or fall.

-Kahlil Gibran, from The Prophet