Everything your doing affects the room around you. It’s returning this to you, controlled and with variations , so that you can see what you’ve done. Then you become the room and that what you have called the room is now what you thought you would be.
This concludes in some possible conclusions. First you are nothing more than the room around you or you are the room itself. Maybe you and the room are made by the same material and that’s a hint to the substance of being.
I like seeing this as a metaphor of a pendulum linked to a solid point that gives you proof about the stable point that we can nor see, hear, feel neither manipulate. It’s only a thought point, derivated by the sensations around us.