Only two things are real:
There is only the One Above,
and you below.
As for this universe you inhabit, it is no more than a means by which the two of you will connect.
Whatever enters your universe today will be precisely what you need to make that connection. Perhaps by doing a mitzvah. Perhaps by overcoming a challenge. Or perhaps by extracting from it some spark of divine wisdom.
As for the other guy, he is the center of his universe. And when you enter his universe, you must know...