Good and evil (n.) is intertwined — No tree can grow to Heaven unless its roots reach down to Hell.
Good and evil (n.) need each other: the best holds the seed of evil because it is the best, and nothing is so bad that good cannot come of it.
Good and evil (n.) do not derive from one another; as halves of a moral judgment they are always there together, like high and low.
Good and evil (n.) are the right and left hand of God, and the whole of creation is to be viewed in pairs of opposites.
Good and evil (n.) grow harder to tell apart the more we know, yet we never escape the demands of ethics: even on the highest peak we are not beyond them.
Good and evil (n.) are the moral face of a natural polarity: life is energy, and there is no energy without opposites.
Good and evil (n.) are, in the self, closer than identical twins.
Good and evil (n.) are only idealized abstractions of doing; no good exists that cannot breed evil, and no evil that cannot breed good.
Good and evil (n.) are relative in the unconscious, which distinguishes the opposites yet recognizes their identity: a theology student dreamt a white magician in a black robe who needs the help of a black magician in a white one, finder of the lost keys of paradise.
Good and evil (n.) coexist side by side rather than one after another — the harder truth St Paul knew from his thorn in the flesh; harder still is seeing the opposites as preconditions of all psychic life, so that life itself is guilt.
Good and evil (n.) are man-made judgments that need each other like above and below, day and night; call God good of everything and "good" loses all meaning.