The Chinese use two brush strokes to write the word 'crisis'. One brush stroke stands for danger; the other for opportunity. In a crisis, be aware of the danger, but recognize the opportunity. Speech in Indianapolis, April 12, 1959

Forgive your enemies, but never forget their names.

The great enemy of the truth is very often not the lie — deliberate, contrived and dishonest — but the myth — persistent, persuasive, and unrealistic. Commencement address, Yale University, New Haven, Connecticut (11 June 1962)

Those who make peaceful revolution impossible will make violent revolution inevitable. Address to Latin American diplomats at the White House (12 March 1962)