Sorrow into Joy

This came in my email today, from Sound Bites:

Your sorrow itself shall be turned into joy. Not the sorrow to be taken away, and joy to be put in its place, but the very sorrow which now grieves you shall be turned into joy. God not only takes away the bitterness and gives sweetness in its place, but turns the bitterness into sweetness itself -- Charles Spurgeon

Your sorrow will be turned into joy.  Have you thought about that before?  What would that mean?  Soured milk into fresh.  Decay into new.

Can you imagine a bitter relationship changed to one of joy?  It isn't that terrible experiences would be removed -- it's that terrible experiences would be turned into ones of joy.

It's hard to imagine.