Then a woman said, Speak to us of Joy
and Sorrow.

And he answered:

Your joy is your sorrow unmasked.

And the selfsame well from which your
laughter rises was oftentimes filled with your
tears. 
And how else can it be?  The deeper that sorrow carves into your being, the more joy you can contain.

Is not the cup that holds 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?

When you are joyous, look deep into
your heart and you shall find it is only that
which has given you sorrow that is giving
you joy.

When you are sorrowful look again in
your heart, and you shall see that in truth
you are weeping for that which has been
your delight.

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.

[Excerpt from “The Prophet”, by Kahlil Gibran] pgs. 29-30