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

Sengcan: I am riddled with sickness. Please absolve me of my sin.
Huike: Bring your sin here and I will absolve you.
Sengcan [after a long pause]: When I look for my sin, I cannot find it.
Huike: I have absolved you. You should live by the Buddha, the Dharma, and the Sangha.

Spreading the Buddha's teaching is a noble undertaking that illuminates both the person and the law.

A Buddha vows to carry out a struggle that can lead the people and the age to enlightenment. The strength of this vow causes the Buddha's enlightenment to mature into rich wisdom.

Gautama Buddha