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As a retain for our statement above, we might mention the Tarot cards as an example. These esoteric cards nowadays degraded to a formula of divination, was authentically a training hand-operated for the promotion of one's spiritual and divine expression in the world of matter. The pictorial diagrams of the Major and Minor Arcana holds secrets that the casual operator of the cards are unaware of. When properly understood the Tarot cards take us step by step to our goal of human perfection straight through the alchemical process.
Having gone secret the Initiates of the difficulty Schools were quick to proper the popular religions to embody their secret doctrines and practices. Not only are satanic elements quick to jump on the bandwagon of spiritual establishments, angelic military are adept in letting the Dark Ones think that they have the upper-hand while in the meantime reorganizing their army and infiltrating stealth-like into their religious camp upsurped from the Light forces. Like Dante, angelic consciousness wrote books of their spiritual wisdom using Christian imagery; or painters like the multi-genius Leonardo Da Vinci, who represented foremost occult precepts in his artwork using Christian themes. Music composers too, cleverly inserted mystical formulas and teachings into their symphonies, concertos, operas and sonatas. As an example, the musical piece, "The Magic Flute" of Mozart comes to mind. However, what is relevant here is that occult signs are portrayed profusely, graphically in art, and we would do well to focus on that.