'Dare to know' -- one essay defined what it means to think for yourself

Answering a magazine's question in 1784, Immanuel Kant defined enlightenment as humanity's escape from 'self-incurred immaturity' -- not a lack of intelligence, but a lack of courage to use one's own reason without being told what to think. His motto, sapere aude, 'dare to know,' became a rallying cry for the European Enlightenment.

— Immanuel Kant, An Answer to the Question: What Is Enlightenment? — Berlinische Monatsschrift, 1784