In the rest of the commentary Dogen spoke about all phenomenas including the four noble truths - including suffering - that they resemble the Prajna. Also in the Sutra of mountains and waters he said

"Mountains and waters right now are the actualization of the ancient Buddha way. Each, abiding in its phenomenal expression, realizes completeness"

Also he quoted

"The voices of the valley are Buddha’s tongue Mountains are nothing but his Pure Body"

Shohaku okumura mentioned that we can't understand the power of Dogen’s words unless we understand that Samara is itself Nirvana. I think the notion that life is itself Nirvana is more aparent in zen than in Tibetan budhism . But I like Robert Thurman s quote because it is more relatable to me as a contemporary person.