The deeper that sorrow carves into your being, the more joy you can contain.
Is not the cup that hold your wine the very cup that was burned in the potter's oven?
And is not the lute that soothes your spirit, the very wood that was hollowed with knives?
Khalil Gibran, The Prophet.
For those who may be wondering, it reads fourtouness, which means storm but can also be 'troubles' when used metaphorically.