No virtue can exist without its corresponding evil: without the evil of danger there could be no courage, without suffering there could be no sympathy, without poverty there could be no generosity, and so forth. Without darkness there could be no light, without cold there could be no hot, without depths there could be no heights.
Thus there must be wickedness so there might be righteousness, death so there might be life, that which is satanic so there might be that which is godly. Were there no opposites, all things must remain “a compound in one.”
Imagine a world in which all things were the same color, were the same size, and had the same functions world in which one could neither have nor be without; a world with neither sound nor silence; a world in which there was no beauty or lack of it; a world without love or hate, the sweet or the sour, virtue or vice.