"If the human perception of a house or a tree is forever haunted by some hidden surplus in the things that never becomes present, the same is true of the sheer causal interaction between rocks or raindrops. Even inanimate things only unlock each other's realities to a minimal extent, reducing one another to caricatures...even if rocks are not sentient creatures, they never encounter one another in their deepest being, but only as present-at-hand." Graham Harman.
