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Shakespeare, William. "Romeo and Juliet." The Norton Shakespeare, edited by Stephen Greenblatt, et al., 3rd ed., W. W. Norton & Company, 2015, act 2, sc. 3.
Matthew 6:34
The Holy Bible, New International Version. International Bible Society, 1978. (Matthew 6:34).
Coolidge, Calvin. In conversation with Herbert Hoover. c. 1930.
Coolidge, Calvin. Quoted in Coolidge: An American Enigma, written by Robert Sobel. Regnery History, 2000.
Thomas, Lewis. Address given at Mount Sinai School of Medicine. c. 1978, Mount Sinai School of Medicine, New York City, NY, USA.
Shakespeare, William. Twelfth Night, Or What You Will. 1602, Middle Temple Hall, London, England, UK, act 1, sc. 3.
Shakespeare, William. "Twelfth Night." The Norton Shakespeare, edited by Stephen Greenblatt, et al., 3rd ed., W. W. Norton & Company, 2015, act 1, sc. 3.
Confucius. 論語 [The Analects]. c. 479 BCE.
Confucius. The Analects, edited and translated by Annping Chin. Penguin Classics, 2014.
Orwell, George. Down and Out in Paris and London. Victor Gollancz, 1933, ch. 3.
Philippians 4:6
The Holy Bible, New International Version. International Bible Society, 1978. (Philippians 4:6).
Matthew 6:31
The Holy Bible, New International Version. International Bible Society, 1978. (Matthew 6:31).
The Holy Bible: New American Standard Bible. The Lockman Foundation, 1971. (Matthew 6:25-26).