That which Preserves the Species Friedrich Nietzsche

The strongest and most evil spirits have to date advanced mankind the most: they always rekindled the sleeping passions - all orderly arranged society lulls the passions to sleep; they always reawakened the sense of comparison, of contradiction, of delight in the new, the adventurous, the untried; they compelled men to set opinion against opinion, ideal plan against ideal plan. By means of arms, by upsetting boundary stones, by violations of piety most of all: but also by new religions and morals! In every teacher and preacher of we encounter the same kind of "wickedness" which makes a conqueror infamous, although it expresses itself more refinedly, and does not immediately set the muscles in motion (and just on that account does not make so in famous!) The new, however, is under all circumstances the evil, as that which wants to conquer, which tries to upset the old boundary-stones and the old piety; only the old is the good! The good men of every age are those who go to the roots of the old thoughts and bear fruit with them, the agriculturists of the spirit. But every soil becomes finally exhausted, and the ploughshare of evil must always come once more. There is at present a fundamentally erroneous theory of morals which is much celebrated, especially in England: according to it the judgments "good" and "evil" are the accumulation of the experiences of that which is "expedient "and "inexpedient "; according to this theory, that which is called good is conservative of the species, what is called evil, however, is detrimental to it. But in reality the evil impulses are just in as high a degree expedient, indispensable, and conservative of the species as the good: only, their function is different.