" Under Small’s influence Jefferson came to share Immanuel Kant’s 1784 definition of the spirit of the era: “Enlightenment is man’s emergence from his self-imposed immaturity,” Kant wrote.21 “Immaturity is the inability to use one’s understanding without guidance from another. This immaturity is self-imposed when its cause lies not in lack of understanding, but in lack of resolve and courage to use it without guidance from another. "
― Jon Meacham , Thomas Jefferson: The Art of Power