For the great enemy of truth is very often not the lie — deliberate, contrived and dishonest — but the myth — persistent, persuasive, and unrealistic. Too often we hold fast to the cliches of our forebears. We subject all facts to a prefabricated set of interpretations. We enjoy the comfort of opinion without the discomfort of thought.

John F. Kennedy (1917–1963) American politician, author, journalist, US President (1961–63)

Commencement Address, Yale University (1962-06-11)
    (Source)