Thank you for the adds 
Well, yeah, and no I guess.
Grief is a source, a well, yes.
But then, please forgive this, the process of grief regurgitating is also "just" a state, a tuning, a practice.
With that last I mean no disrespect to the grief's cause (that stays legit), but then one could ask inquisitively-daring in how far that ongoing grief-processing is, zooming out, a cloaked thing, coming from whatever seen or more likely unseen drive.
Even more daring: in how far is grief attracted for a (hidden) reason?
I've felt grief for my partner before, but then realize later that this might have been element of the falling in love, happening just out of my eye corner.
:shock:
levers come in surprising shapes.
I stray from generalizing!!!
Just probing grief's features and biting my lip to withhold "grief-addiction".
Darn, it's out 
As an exercise I like to balance "practicing grief" with a "need". Nothing wrong with "needing", all human natural. Yet a change of spotlight on grief perhaps. It might mediate (emotional) gravity on occasion.
Grief as a final step:
the Tao winks that it's just (like anything for that matter) an energy form, and thus transformable without loosing any of it's potential (like a battery, it is still open to use differently). Hardly anything final to the Tao.
I do not think IMHO that iceman transformed grief into the miraculous spin-offs, but suspect he used grief as a katalist instead with the grief remaining pristine to function (more power to him !).
BTW in the "now" there isn't enough place to accommodate grief. 