The process of tracing regularity in any complicated, and at first sight confused, set of appearances, is necessarily tentative; we begin by making any supposition, even a false one, to see what consequences will follow from it ; and by observing how these differ from the real phenomena, we learn what corrections to make in our assumption.
John Stuart MillIf it were felt that the free development of individuality is one of the leading essentials of well-being; that it is not only a coordinate element with all that is designated by the terms civilisation, instruction, education, culture, but is itself a necessary part and condition of all those things; there would be no danger that liberty should be undervalued.
John Stuart MillComplete liberty of contradicting and disproving our opinion, is the very condition which justifies us in assuming its truth for purposes of action.
John Stuart MillAll errors which a man is likely to commit against advice are far outweighed by the evil of allowing others to constrain him for his good.
John Stuart Mill