Daily Dharma

Don't let go of Mu even for a moment while sitting, standing, walking, eating, working ... To become lax even for a second is to separate yourself from Mu. Even when you go to bed continue to absorb yourself in Mu and when you awaken, awaken with your mind focused on Mu. At every moment your entire attention must be concentrated on penetrating Mu ... You will become enlightened only after you have poured the whole force of your being into oneness with Mu ... Once you realize Mu, you know that nothing can be opposed to it, since everything is Mu ... In the intense asking, "What is Mu?" you bring the reasoning mind to an impass, void of every thought ... Trying to answer "What is Mu?" rationally is like trying to smash your fist through an iron wall ... Only through unthinking absorption in Mu can you achieve oneness ... Mu is beyond meaning and no meaning.

—Yasutani Roshi

...quoted in Chapter 5, Zen Meditation Exercises in Thorsons Principles of Zen by Martine Batchelor, pages 85-86