A billion worlds can be sat through within a single sitting. - Dōgen

Buddhas and Ancestors continuously maintain ocean mudra samadhi. While swimming in this samadhi, they expound, realize, practice.

Students, when you want to say something, think about it three times before you say it. Speak only if your words will benefit yourselves and others. Do not speak if it brings no benefit.

Such a practice requires exerting all your energies.5 If a man entrusted with this work lacks such a spirit, then he will only endure unnecessary hardships and suffering that will have no value in his pursuit of the Way.