The business of philosophy is not to give rules, but to analyze the private judgments of common reason.

Enlightenment is man's leaving his self-caused immaturity. Immaturity is the incapacity to use one's intelligence without the guidance of another. Such immaturity is self-caused if it is not caused by lack of intelligence, but by lack of determination and courage to use one's intelligence without being guided by another. Sapere Aude! Have the courage to use your own intelligence! is therefore the motto of the enlightenment.

Maturity is having the courage to use one's own intelligence!

Enlightenment is the liberation of man from his self-caused state of minority... Supere aude! Dare to use your own understanding!is thus the motto of the Enlightenment.

[A ruler is merely] the trustee of the rights of other men and he must always stand in dread of having in some way violated these rights.

Freedom is the alone unoriginated birthright of man, and belongs to him by force of his humanity.

Give a man everything he wants and at that moment everything is not everything