[david44]

To me everything means to include "all that we don't know about" as well. Just as was previously mentioned (I know) but I would like to clarify a little bit more.
A person from India will never know the life of an Alaskan. A person who spends their entire life in New York will never know the life of an Australian. A soccer player will never know the life of an astronaut. A bus driver will never know the life of a coal miner and so on. And yet each and every person has their own experiences and knowledge, and so I think that everything must encompass all of those things we don't know that is a part of the knowledge of others as well, and not just from a physics point of view.

cheers David