Lyric discussion by weemansyndrome256 

I think it's about him wanting to succeed at something in his life that everybody else (or maybe a voice in his head?) is trying to stop him from doing (You think to much about the wrong things). The "Take on the world" verse seems like him talking to himself, he knows he can do it. He feels constricted (the snake image) as he can't just do what he wants.

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