John Dee - Monas Hieroglyphica (The Hieroglyphic Monad)
This is John Dee's enigmatic treatise on symbolic language. Although published in 1564 at age 37, he considered it valuable throughout his life. The Monas is a highly esoteric work. In it he claims himself in possession of the most secret mysteries. He wrote it in twelve days while apparently in a peak (mystical) state: “[I am] the pen merely of [God] Whose Spirit, quickly writing these things through me, I wish and I hope to be.” He claims it will revolutionize astronomy, alchemy, mathematics, linguistics, mechanics, music, optics, magic, and adeptship.