“Number is the ruler of forms and ideas, and the cause of gods and daemons.”
As quoted in Life of Pythagoras (c. 300) by Iamblichus of Chalcis, as translated by Thomas Taylor (1818)
Variants:
Number rules the universe.
As quoted in The Story of a Number (1905) by E. Maor; also in Comic Sections (1993) by Desmond MacHale