So the most difficult thing is always to keep your beginner's mind. There is no need to have a deep understanding of Zen. Even though you read much Zen literature, you must read each sentence with a fresh mind. You should not say, “I know what Zen is,” or “I have attained enlightenment.” This is also the real secret of the arts: always be a beginner. Be very very careful about this point. If you start to practice zazen, you will begin to appreciate your beginner's mind. It is the secret of Zen practice.

In the beginner's mind there is no thought, “I have attained something.” All self-centered thoughts limit our vast mind. When we have no thought of achievement, no thought of self, we are true beginners. Then we can really learn something. The beginner's mind is the mind of compassion. When our mind is compassionate, it is boundless. Dogen-zenji, the founder of our school, always emphasized how important it is to resume our boundless original mind. Then we are always true to ourselves, in sympathy with all beings, and can actually practice.