George Santayana Quotes about Evil

George Santayana, Marianne S. Wokeck, Martin A. Coleman, James Gouinlock (2011). “The Life of Reason or The Phases of Human Progress: Introduction and Reason in Common Sense, Volume VII, Book One”, p.174, MIT Press
The combative instinct is a savage prompting by which one man's good is found in another's evil.
George Santayana (2015). “The Life of Reason: Human Understanding”, p.57, 谷月社
The existence of any evil anywhere at any time absolutely ruins a total optimism.
George Santayana, Martin A. Coleman (2009). “The Essential Santayana: Selected Writings”, p.599, Indiana University Press