Et al.
I thought this was an interesting distinction made from Schopenhauer's metaphysical voluntarism viz the contrast from Kant's thing-in-themselves (nature of existence). Generally, Kant reduced limits of reason to (unknowable) phenomena, whereas S reduced it to the Will (as taken from the Schopenhauer's Will in Nature):
"My system therefore, far from soaring above all reality and all experience, descends to the firm ground of actuality, where its lessons are continued by the Physical Sciences.
Now the extraneous and empirical corroborations I am about to bring forward, all concern the kernel and chief point of my doctrine, its Metaphysic proper. They concern, that is, the paradoxical fundamental truth, that what Kant opposed as thing–in–itself to mere phenomenon (called more decidedly by me representation) and what he held to be absolutely unknowable, that this thing–in–itself, I say, this substratum of all phenomena, and therefore of the whole of Nature, is nothing but what we know directly and intimately and find within ourselves as the
will;
that accordingly, this will, far from being inseparable from, and even a mere result of, knowledge, differs radically and entirely from, and is quite independent of, knowledge, which is secondary and of later origin; and can consequently subsist and manifest itself without knowledge: a thing which actually takes place throughout the whole of Nature, from the animal kingdom downwards;
that this will, being the one and only thing–in–itself..."
[ Commentary: Schopenhauer attaches a far wider meaning to the word than is usually given, and regards the will, not merely as conscious volition enlightened by Reason and determined by motives, but as the fundamental essence of all that occurs, even where there is no choice.]
With respect to "no choice" (volitional existence) in Psychology (Voluntarism is interesting in that it covers a lot of disciplines), my view is more of an unconscious will to live and survive, and to have beliefs and hopes about our existence here. Otherwise we have denial of the will that's manifested by some things like:
-personal experience of an extremely great suffering that leads to loss of the will to live.
-knowledge of the essential nature of life in the world through observation of the suffering of other people.
My question is, what is the metaphysical will to exist (both for Man, and Universe)?