Here’s an interesting quote from William Walker Atkinson:
“Of all the varied manifestations of Power proceeding from that POWER which the best human thought perceives to be the source and origin of all the Power in the Universe, that manifestation which we know as Will Power seems to be the most fundamental, the most elemental, the most universal. It is seen by philosophers to constitute the very kernel or heart of all phases and forms of Personal Power.
Many, indeed, have held that in Will Power abides the ultimate principle of the Universe—and that all forms of Power, Force and Energy, at the last, must be thought of in terms of Will Power.
Whatever may be the ultimate facts of the Universe, there can be no dispute concerning the dominating position occupied by Will Power in the life and being of the individual man. When you undertake the task of self‑analysis, you will find your Will at the very centre of your being—so close to the “I AM I” or Ego, that it is most difficult to disentangle it from your Real Self. Your sensations, your passions, your emotions, your tastes and your talents are found to be under the control of your trained Will. You may set them aside from yourself and analyze them, correct them, improve them; but the Will lies closer to yourself—you cannot set it apart from yourself as you can the other mental states. It is neither sensation nor emotion— though it may dominate both. It is always subjective and active, abiding and operating from the very citadel of your being.
Emotion and Thought may lie deep in your being—but Will lies still deeper. Emotion and Thought are objective to the Will, and may be influenced and directed by it. You are conscious of your sensations and of your emotions as merely incidental to your existence. But you are directly conscious of your Will, just as you are conscious of your self‑existence. You can modify your other mental states, but you cannot modify your Will in the same way; the Will is your sole instrument of modification and it cannot be turned back on itself. The office of the Will is that of Action; and in its activities it directs and orders, commands and regulates the other mental states. In fact, the Will acts chiefly through and by means of its control and direction of your other mental states.
Will Power may be developed and trained, of course— otherwise this book would have no purpose and intent. But it is not to be developed and trained as are the other mental states or powers—for these are modified by the action of the Will upon them. Unlike theirs, its development consists rather of the unfolding into fuller expression of a fundamental power which already exists—the transformation of latent and static Will into active and dynamic Will. This form of “development” is defined as “the act of freeing from that which envelopes.” Its training, likewise, is different. Instead of its being trained by a higher mental faculty or power, the Will itself proceeds to improve, deepen, widen and strengthen the channels through which its currents flow. We, therefore, employ the term, “the development and training of the Will,” only in this sense.”
To develop and train your Will you can start with the course:
>>> Will Mastery