This Is Water
Commencement speech by David Foster Wallace
Two fish swim by an older fish, who asks them "How's the water today boys?" The younger fish look at each other confused, and ask "What's water?
What is the "water" of a context, the nearly invisible axioms you operate with?
In his speech, Wallace illustrates how the choice of what to think about--in traffic, at the grocery store--is the "water" of being human.