Our life in this world -
to what shall I compare it?
Its like an echo
resounding through the mountains
and off into the empty sky.
If the doors of perception were cleansed, everything would appear
to man as it is: infinite.
For man has closed himself up, till he sees all things thro’ narrow
chinks of his cavern.
—William Blake, from “Book the Second” in “Milton: A Poem in Two Books,” The Complete Poetry and Prose of William Blake, edited by Erdman, Bloom, and Golding (University of California Press, 1982)