I think it's about having a darker perspective of life. Sometimes a person might ask "Is it cold in here, or is it just me?" That's a stupid example, but I think that's the kind of context the words are meant to be read. Davis says "You see beauty, I see pain. You see sky and I see acid rain. It's me again." I think what he means is that while something may seem bad, it's only the way he percieves it. It's suprising that he realizes that. He seems so angry, maybe even spiteful, to those who view things differently because this is always happening to him. He's sick of negative perception poisoning his experiences. (My first meaningful contribution)