Enlightenment is man's emergence from his self-imposed nonage. Nonage is the inability to use one's own understanding without another's guidance. This nonage is self-imposed if its cause lies not in lack of understanding but in indecision and lack of courage to use one's own mind without another's guidance. Dare to know!
Source: from Kant's essay "What is Enlightenment" quoted in Calculated Risks: How to Know When Numbers Deceive You by Gerd Gigerenzer
Contributed by: Laurie