Remus is the ‘good’ twin because he does acceptable things and Romulus is the ‘bad’ twin because he doesn’t. Together Romulus and Remus accomplish great feats but they can’t stop arguing over who should be in charge. Finally, Romulus kills Remus in self defense. Flip sides of the same coin. Where the light shines brightest, the shadows are longest and, of course, it works in reverse.
Yet like Gemini, we cannot find success until we give voice to both our dark and light sides, at least according to Jungian psychology.
The image of God lodged in a creature of earth equals disunion with the divine. In Judeo-Christian traditions, Eve & the snake get blamed for this because the tree of knowledge gave us awareness of dichotomy (dark /light, birth/death). Paradoxically, it is such awareness that signals birth on earth.