At this point, I can no longer avoid setting out, in an initial, provisional statement, my own hypothesis about the origin of “bad conscience.” It is not easy to get people to attend to it, and it requires them to consider it at length, to guard it, and to sleep on it. I consider bad conscience the profound illness which human beings had to come down with, under the pressure of the most fundamental of all the changes which they experienced—that change when they finally found themselves locked within the confines of society and peace. Just like the things water animals must have gone though when they were forced either to become land animals or to die off, so events must have played themselves out with this half-beast so happily adapted to the wilderness, war, wandering around, adventure—suddenly all its instincts were devalued and “disengaged.”From this point on, these animals were to go on foot and “carry themselves”; whereas previously they had been supported by the water. A terrible heaviness weighed them down. In performing the simplest things they felt ungainly. In dealing with this new unknown world, they no longer had their old leader, the ruling unconscious drives which guided them safely. These unfortunate creatures were reduced to thinking, inferring, calculating, bringing together cause and effect, reduced to their “consciousness,” their most impoverished and error-prone organ! I believe that on earth there has never been such a feeling of misery, such a leaden discomfort—while at the same time those old instincts had not all at once stopped imposing their demands! Only it was difficult and seldom possible to do their bidding. For the most part, they had to find new and, as it were, underground satisfactions for them.
Friedrich Nietzsche, On the Genealogy of Morals
guilt, morality