'As Colin Wilson explains in The Occult, Aleister Crowley was hardly the first occultist to proclaim the dawning of a new epoch in the early years of the twentieth century; August Strindberg, the radical playwright and painter, was just one in a long line of prophets of dissent whose voice and preoccupations Crowley (and his Guardian Angel) unconsciously reflected. But rarely, if ever, can the perennial philosophy have been communicated as forcefully, and with such delirium, as in The Book of the Law - 'transcribed' over three days in April 1904: a communication which, for Thelemites, marks the beginning of the (new) Aeon of Horus. In keeping with the approximate duration of a Precessional Year- the time it takes for the sun to complete a circuit around the full circumference of the sky, as measured by the changing astronomical conditions behind its rising point on the equinox - the end of the Aeon was not expected for around 2,160 years.' (Ben Fairhall article).

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