It is said that after studying with every spiritual master of his time, the Buddha, still unenlightened, sat down under the banyan tree and simply touched the ground. It was at that moment he saw the emptiness of all things and became enlightened.
Some say this is only a metaphor, and that the ground he touched in that moment was the ground of his own being.
The Void, from the Orbifold Tarot, available here
Mirrors of Consciousness 