For the will, though the nearest we can get to the thing-in-itself, is in truth a partially phenomenalised expression of this.
The fountain and support of it is the will to live, or the thing-in-itself, which we are.
Ultimately, freedom is a mystery, and takes us beyond even will as the name for the thing-in-itself.
The thing-in-itself is the unknowable reality of the thing we know.
To others, this sense of mystery is a prophetic anticipation of the Kantian thing-in-itself.
The thing-in-itself either is or else it is not the reality of phenomena.
As a philosopher, he is interesting for his criticism of the theory of the “thing-in-itself” (Ding-an-sich).
What the reality is, is the problem of the thing-in-itself (to use the Kantian term).
On the other hand, everything as thing-in-itself is free; for 'freedom' means only non-subjection to that law.
But for that matter, Electricity is only known to us as associated with some form of Substance, and not as "a thing-in-itself."