‘Zen is very simple…What are you?
In this whole world everyone searches for happiness outside, but nobody understands their true self inside.
Everybody says, “I” – “I want this, I am like that…” But nobody understands this “I.”
Before you were born, where did your I come from? When you die, where will your I go? If you sincerely ask, “what am I?” sooner or later you will run into a wall where all thinking is cut off. We call this “don’t know.”
Zen is keeping this “don’t know” mind always and everywhere.
Meditation in Zen means keeping don’t-know mind when bowing, chanting and sitting Zen. This is formal Zen practice. And when doing something, just do it. When driving, just drive; when eating, just eat; when working, just work.’ (from the Cambridge Zen Center website)