Ultimately, there is only True Will, which is Divine in origin.

In Kabballah the Kether of the Yechida is the fountainhead of God's energy pouring into the Tree of Life that is the unique expression of every human soul, like a snowflake prism for the Light of All. In tantra, this would be kundalini energy which is seen as inherent to the dharma (path or way) of the Very Subtle Consciousness, the eternal aspect of the soul which acts on the karmic wheel of Samsara and will be the final refined product to "escape" as output.

I said that it is like the Unpolished Stone and the Untrained Mind because in tantra the goal is to defeat the ego utterly, and make it indistinguishable from the rest of conscious reality. So Will and Ego are synonmous in tantra.

Western magick, which is the home of the term Adversary (Satan), sees Will as also the product of Divine expression, however, the Will and Ego are seen as separate entities. The goal in this system is to connect the expression of human will to the Divine Will so as to refine the Ego as a tool for acting as God intends. The Will remains an adversary so long as it is seen apart from the Divine.

Understanding this thoroughly involves rejecting the duality that would presuppose the Satan as an Adversary to be working in opposition to evolution, instead it is necessary to see opposing forces as required for any kind of progress.