Try this, it makes a lot more sense:

A Different da Vinci Code:

"The intellectual influence of Renaissance Hermeticism on art, rather than a depiction of Mary Magdalene at the Last Supper, is the basis for A Different da Vinci Code. This is an alternative explanation of Leonardo's symbolism, which proposes the typical use of transgender figures in various artworks of the period as a veiled reference to the alchemical androgyne (cf. Sophia/Baphomet), representing the keenly anticipated rebirth of classical knowledge and culture. Similarly, Leonardo's use of the up-pointed finger of Mercury/Hermes, also referred to as the John Gesture, is proposed to denote the universal Hermetic motto, "As above; so below.""

http://altreligion.about.com/library/davinci/bl_differentdvc.htm

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