Boredom

"Do you know what it feels like to be aware of every star, every blade of grass? We have done it for eternity. No sleep, no rest, just endless, endless experience, endless awareness. Of everything. All the time. How we envy you, envy you. Lucky humans, who can close your minds to the endless cold deeps of space! You have this thing you call boredom. That is the rarest talent in the universe. You build little worlds, little stories, little shells around your minds and that keeps infinity at bay and allows you to wake up in the morning without screaming!...

You humans are so good at ignoring things. You are almost blind, almost deaf. You look at a tree and see just a tree, a stiff weed. You don't see its history, feel the pumping of the sap, hear every insect in the bark, sense the chemistry of the leaves, notice the hundred shades of green, the tiny movements to follow the sun, the subtle growth of the wood..."

--Terry Pratchett, A Hat Full of Sky