Slade

“Both teachers and learners go to sleep at their post as soon as there is no enemy in the field.”
― John Stuart Mill, On Liberty

“But reflecting persons perceived that when society is itself the tyrant—society collectively, over the separate individuals who compose it—its means of tyrannizing are not restricted to the acts which it may do by the hands of its political functionaries. Society can and does execute its own mandates: and if it issues wrong mandates instead of right, or any mandates at all in things with which it ought not to meddle, it practises a social tyranny more formidable than many kinds of political oppression, since, though not usually upheld by such extreme penalties, it leaves fewer means of escape, penetrating much more deeply into the details of life, and enslaving the soul itself.”
― John Stuart Mill, On Liberty and Other Essays

“No one can be a great thinker who does not recognize that as a thinker it is his first duty to follow his intellect to whatever conclusions it may lead.”
― John Stuart Mill, On Liberty

“History enters when the space of the possible is vastly larger than the space of the actual.”
― Stuart A. Kauffman, Reinventing the Sacred: A New View of Science, Reason, and Religion