Number Symbolism in Tarot: Most of us think of zero as a starting point, from which we count our way up—or down, into negative numbers. Because zero seems to precede all of the other numbers, it symbolizes the period before existence—the great void that existed before the world was created, before the Big Bang when the universe burst into existence. The circular shape of the number 0 is also a reminder of the cosmic egg, the legendary source of the universe. It suggests the outward growth of the universe from a single point in space. It also symbolizes the shape of the world, the orb of planetary motion, the wheel of the year, and the cycle of life. It’s even a reminder of the womb, the birth canal, and the cells that make up our substance.