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“He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them. But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion... Nor is it enough that he should hear the opinions of adversaries from his own teachers, presented as they state them, and accompanied by what they offer as refutations. He must be able to hear them from persons who actually believe them...he must know them in their most plausible and persuasive form.”
― John Stuart Mill, On Liberty

“When you see that in order to produce, you need to obtain permission from men who produce nothing - When you see that money is flowing to those who deal, not in goods, but in favors - When you see that men get richer by graft and by pull than by work, and your laws don’t protect you against them, but protect them against you - When you see corruption being rewarded and honesty becoming a self-sacrifice - You may know that your society is doomed.”
― Ayn Rand, Atlas Shrugged

“Consider your origin. You were not formed to live like brutes but to follow virtue and knowledge.”
― Dante Alighieri, The Divine Comedy: Inferno - Purgatorio - Paradiso

“The line separating good and evil passes not through states, nor between classes, nor between political parties either -- but right through every human heart -- and through all human hearts. This line shifts. Inside us, it oscillates with the years. And even within hearts overwhelmed by evil, one small bridgehead of good is retained”
― Aleksandr Solzhenitsyn, The Gulag Archipelago 1918–1956