Aleister Crowly talks about the True Will. This is not the general desire, but the WILL, that which drives a person through life. It is so powerful that I believe it should always be capitalized. The Will.
He also talks about using the occult in order to find what the true Will is. I won't lie, I put it to use. I had three things I had narrowed it down to being, the occult being one of them. It helped me find what my true Will is, what my purpose and true love in life is, the one thing that if I should find myself unable to do it would surely kill me!
And my Will is writing.
Seems kind of like a cop-out answer on a site like this, but it's true. I put it to the test by practicing the occult practices, and I was going to write a book about my journey to find my Will, but I found that when push came to shove, I was loathed to do my occult practices because it meant that I didn't have a pen in my hand during that moment. And then I knew.