When it all began, heaven was here on earth. This physical, earthly world, more than any of the higher spiritual worlds, was the place where the very essence of G‑d’s infinite light could be found. But humankind, step by step, banished that divine presence from its home, with a tree of knowledge, with a man who murdered his brother, with all those things that human beings do… Since humankind chased it away, only humankind can bring it back. And...