Those words seemed to induce a grave realization within his mind. But the realization was incomplete. It was too big for him to articulate in a short amount of time, so his mind froze in the process.
His mind remained frozen like that for a long time. He didn't know how much time it was because he couldn't think. A thought of great significance was trying to come out of his mind, and it was taking all of his mental resources to give birth to it.
He was stuck in the process of producing that thought for an unknown amount of time. But when he saw the other black cube start swimming towards him, every piece of the puzzle clicked, and understanding flared into life in his mind.
"He is me, and I am him. We are one, whether in the past or the future. This is the fourth dimension."
As this seed of understanding blossomed in his mind, he stopped seeing himself as an entity confined to the third dimension, allowing many versions of himself to appear in his vision.
