For more about the 13th century Soto Zen patriarch Dogen Zenji, see this earlier post.

There is a simple way to become buddha: When you refrain from unwholesome actions, are not attached to birth and death, and are compassionate toward all sentient beings, respectful to seniors and kind to juniors, not excluding or desiring anything, with no designing thoughts or worries, you will be called a buddha. Do not seek anything else.

Translated by Arnold Kotler and Kazuaki Tanahashi.