Cynicism is a great cure for over-study. There is a great deal of cynicism in this book, in one place and another. It should be regarded as Angostura… - Aleister Crowley

"The ethical aspect of the Law of Thelema is simple enough theoretically. "Do what thou wilt" does not mean "do what you please"; though this degree of emancipation is implied, that we can no longer say á priori that any given course of action is "wrong". Every man and and every woman has an absolute right to do his or her true will.

At the same time, to quote The Book of the Law, "... thou hast no right but to do thy will". So then, the new Law really announces a stricter bondage than any previous law and this in accordance with biological teaching. An organism progresses by self-imposed inhibitions."

... it was once necessary to proclaim the entire doctrine of Yoga in the fewest possible words.... I did so.
“Sit still. Stop thinking. Shut up. Get out!”
The first two of these instructions comprise the whole of the technique of Yoga. The last two are of a sublimity which it would be improper to expound in this present elementary stage.

Each being is, exactly as you are, the sole centre of a Universe in no wise identical with, or even assimilable to, your own. The impersonal Universe of Nature is only an abstraction, approximately true, of the factors which it is convenient to regard as common to all. The Universe of another is therefore necessarily unknown to, and unknowable by, you; but it induces currents of energy in yours by determining in part your reactions. Use men and women, therefore, with the absolute respect due to inviolable standards of measurement; verify your own observations by comparison with similar judgements made by them; and, studying the methods which determine their failure or success, acquire for yourself the wit and skill required to cope with your own problems.