Bodhidharma

Emperor Wu of Liang asked the great master Bodhidharma, "What is the highest meaning of the holy truths?"
Bodhidharma said, "Empty, without holiness."
The Emperor said, "Who is facing me?"
Bodhidharma replied, "I don't know."
- Bodhidharma

Source: The Zen Teaching of Bodhidharma