There are multiple universes, and you can travel to any one of them on any day.
There is one universe in which you stand at the center while all else orbits about you.
There’s another universe where someone else stands at the center and everything orbits around him or her.
And both are true, real universes, because each of us truly is responsible for the destiny of our world, as the Mishnah says, “Every human being must say, ‘The universe was created for me to repair.’”
The equipment you need for your journey is already yours. Because if you can understand that you are the center of your world, you can understand how the other guy is the center of his.
Just adjust your mind, open your heart, and envision the universes of these other beings.
Then go treat them accordingly.
Yes, you can become a multiverse trekker without even walking out your front door. You don’t even have to leave yourself behind.

Rabbi Freeman, you state your perspective compellingly.
But who can enter another person's universe without losing themselves?
How can we put up strong enough boundaries so as not to be swallowed up?
You bring a spinning top like in Christopher Nolan's film, Inception, or have a lanyard like Astronauts use when they go outside of the space station.
One possibility.
If one believes themselves to be a physical egotistical entity then that must be conquered first.
Work to know our infinite creator and in the process one discovers their true self. Your True Self can do all of what he speaks and more as easily as you breath air.
Wishing you well on the great voyage of discovery.
It’s a very important question, but the fact is, without an ego of your own it’s not possible to relate to the world of another person.
But there’s a natural quality of human beings called empathy. All we need is to put aside our own egos enough for that natural empathy to function.
In other words, we need to be healthy human beings.
Forget about strong boundaries - we are all being swallowed up. You would not lose yourself - you will find out more about yourself. As Jews, we need to stay relevant with the Zohar. Please don't limit your thinking!
Thank you.
Yes!! Yes !! Yes !! We have already been given everything we need to traverse this and other universes.
Great article on Quantam Physics and the Kabbalah - Uncertainty, Unknowability, and Free Will in Kabbalah and Quantum Mechanics By Chaim (Hyman) M. Schipper
Thanks.