Learning
Reynolds, Joshua. "Discourse VI." 10 Dec. 1774, Royal Academy of Arts, London, England, UK. Lecture.
Hippocrates. Aphorisms. c. 370 BC, sect. 1, pt. 1.
Hippocrates. The Aphorisms. Classics of Medicine Library, 1982, sect. 1, pt. 1.
Plotinus. The Six Enneads. c. 270, bk. 2, treatise 3.
Plotinus. The Enneads, edited by Lloyd P. Gerson, translated by George Boys-Stones, et. al. Cambridge University Press, 2018, bk. 2, treatise 3.
JFK was assassinated while he was on the way to give the speech containing these words.
Kennedy, John F. "Remarks Prepared for Deliver at the Trade Mart in Dallas on November 22, 1963." Speech undelivered due to assassination.