"Seeing mountains and rivers differs according to the type of being seeing them. There are beings who see what we call water as a jeweled necklace. This does not mean, however, that they see a jeweled necklace as water. How, then, do we see what they consider water? Their jeweled necklace is what we see as water. Or, again some see water as wondrous flowers, though it does not follow that they use flowers as water. Hungry ghosts see water as raging flames or as pus and blood. Dragons and fish see water as a palace or a pavilion, or as the seven treasures or jewels. Others see water as woods and walls, or as the dharma nature of immaculate liberation, or as the true human body, or as the physical form and essence of mind. Men see these as water. And these different ways of seeing are the conditions under which water is dead or alive. Thus, what different types of beings see is different; and we should reflect on this fact. Is it that there are various ways of seeing one object? Or is it that we have mistaken various images for one object?
...
It is not the case simply that there is water in the world; within the realm of water there are worlds. And this is true not only within water: within clouds as well there are worlds of sentient beings, within wind, within fire, within earth there are worlds of sentient beings. Within the dharma realm there are worlds of sentient beings, within a single blade of grass, within a single staff there are worlds of sentient beings. And wherever there are worlds of sentient beings, there, inevitably, is the world of buddhas and ancestors."
- Dogen (1200 - 1253)
"Mountains and Water Sutra" in Shobogenzo
