Love and Hate, involved in an Eternal War since the beginning of times.
Love and Hate, constantly fighting to gain control over the heart.
Love and Hate, always on the battlefield as foes, but sometimes they laid down their weapons for a while and fought together as allies.
Love would be in control for a while and then Love would casually step aside so Hate could take its place and make the heart crumble a bit, more and more with every type of foul play by the two.
Love and hate, Right and Wrong, Light and Darkness, normally each other's foes, but occassionally each other's allies.