Everything you perceive is contained in your mind.  Sight creates images that are reproduced in our mind.  We don't see something in front of us we actually see a reproduction in our mind.  We don't hear sounds happening in the distance, vibrations travel through the air, hits your ear drum, travel down nerve pathways and a "sound" is reproduced in our mind.  Touch, smell, taste all are perceived and experienced in the same way.  Keeping this truth in your daily awareness will completely change your experience of life.

If everything you are perceiving is inside your mind, where are you?  Your mind is a bubble, "you" are a point of perception inside the bubble.  Everything you perceive is all around you, not the outside world but the inside walls of the bubble.  You could say that you never interact with the outside world but with the inside of your own bubble.