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" Hence, it is quite conceivable that even the sense of guilt engendered by civilization is not recognized as such, but remains for the most part unconscious, or manifests itself as an unease, a discontent, for which other motivations are sought. The religions, at least, have never ignored the part that a sense of guilt plays in civilization. Moreover - a point I failed to appreciate earlier - they claim to redeem humanity from this sense of guilt, which they call sin. From the way in which this redemption is achieved in Christianity - through the sacrificial death of one man, who thereby takes upon himself the guilt shared by all - we drew an inference as to what may have been the original occasion for our acquiring this primordial guilt, which also marked the beginning of civilization. "
― Sigmund Freud , Civilization and Its Discontents
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" The commandment, 'Love thy neighbour as thyself', is the strongest defence against human aggressiveness and an excellent example of the unpsychological [expectations] of the cultural super-ego. The commandment is impossible to fulfil; such an enormous inflation of love can only lower its value, not get rid of the difficulty. Civilization pays no attention to all this; it merely admonishes us that the harder it is to obey the precept the more meritorious it is to do so. But anyone who follows such a precept in present-day civilization only puts himself at a disadvantage vis-a-vis the person who disregards it. What a potent obstacle to civilization aggressiveness must be, if the defence against it can cause as much unhappiness as aggressiveness itself! 'Natural' ethics, as it is called, has nothing to offer here except the narcissistic satisfaction of being able to think oneself better than others. At this point the ethics based on religion introduces its promises of a better after-life. But so long as virtue is not rewarded here on earth, ethics will, I fancy, preach in vain. I too think it quite certain that a real change in the relations of human beings to possessions would be of more help in this direction than any ethical commands; but the recognition of this fact among socialists has been obscured and made useless for practical purposes by a fresh idealistic misconception of human nature. "
― Sigmund Freud , Civilization and Its Discontents