Pythagoras known for his theorem, also, greatly influenced esoteric traditions. Wikipedia’s entry reports, “Pythagoras started a secret society called the Pythagorean brotherhood devoted to the study of mathematics. This had a great effect on future esoteric traditions, such as Rosicrucianism and Freemasonry, both of which were occult groups dedicated to the study of mathematics and both of which claimed to have evolved out of the Pythagorean brotherhood …Pythagorean theory was tremendously influential on later numerology…” “The system of numerology is a method of divination which is also employed in the use of magic,” according to the Mystica website, “the practice is based upon statement of the Greek philosopher Pythagoras, ‘the world is built upon the power of numbers’.”