The Ordeals are at present carried out unknown to the Candidate by the secret Magick Power of The Beast. Those who are accepted by Him for initiation testify that these Ordeals are frequently independent of His conscious care. They are not, like the traditional ordeals, formal, or identical for all; the Candidate finds himself in circumstances which afford a real test of conduct, and compel him to discover his own nature, to become aware of himself by bringing his secret motives to the surface.

Some of the Rituals have been made accessible, that is, the Magical Formulae have been published. See "The Rites of Eleusis", "Energized Enthusiasm", "Book 4, Part III", "etc".

Note the reference to 'not' and 'all'. Also the word 'known' contains the root GN, 'to beget' and 'to know'; while 'concealed' indicates the other half of the Human Mystery.