Wow, that's great. I really like it. While most people like the last line, I think my favourite is:
I can only feel what I cannot leave behind.
I agree with A-glow as well, it's very powerful.
A-glow wrote:knowing most of what is Real to you -is -manufactured by your own perception of who and with what you are interacting.
It's an interesting outlook on life, and a positive one, that only what you let effect you will.