If time or the world had been like your night-black tresses, the black steed of my madness would have sprinted even further ahead.

Here, the poet creates an enchanting atmosphere of darkness, imagining what would happen if time itself had the limitless depth of the beloved's night-black tresses. 'Shab-deez' refers to a legendary black steed, which is used here as a vivid metaphor for the galloping madness and obsession of love. The lover affectionately suggests that had the universe shared the boundless mystery of your dark hair, my wild passion would have raced even farther and broken every boundary.