Warning, it's extremely woo-woo but my T and I are like that...

What he said precisely is that just like light, it's as if we have a particle form and a wave form. In particle form, we see each other once weekly in his office and that's a strict boundary. But in wave form, we can transcend time and space and I can get in touch with him whenever I want (like the pulling on a string from the book) and he will always be there. There are no boundaries or limits to it. He used the example of tuning into a radio station. He said to "see what he says!" but I think that was a half-joke.