If opponents of all important truths do not exist, it is indispensable to imagine them and supply them with the strongest arguments which the most skillful devil's advocate can conjure up.
John Stuart Mill... the besetting danger is not so much of embracing falsehood for truth, as of mistaking a part of the truth for the whole.
John Stuart MillIn proportion as the people are accustomed to manage their affairs by their own active intervention, instead of leaving them to the government, their desires will turn to repelling tyranny, rather than to tyrannizing: while in proportion as all ready initiative and direction resides in the government, and individuals habitually feel and act as under its perpetual tutelage, popular institutions develop in them not the desire of freedom, but an unmeasured appetite for place and power.
John Stuart MillThe philosophy of reasoning, to be complete, ought to comprise the theory of bad as well as of good reasoning.
John Stuart Mill