If the doors of perception were cleansed everything would appear to man as it is, infinite.

Blake, William. "The Marriage of Heaven and Hell." The Complete Poetry and Prose of William Blake, edited by David V. Erdman. University of California Press, 2008.

Paine, Thomas. "Rights of Man Part the second." Rights of Man, Common Sense, and Other Political Writings, edited by Mark Philp. Oxford University Press, 2009.

Shakespeare, William. "The Sonnets." The Norton Shakespeare, edited by Stephen Greenblatt, et al., 3rd ed., W. W. Norton & Company, 2015, sonnet 147.