1: Quote from Charles Manson. I think it holds truth in the way people think of themselves and they way they are viewed by others (this does not necessarily mean looking to or down to a person of different height).
2: Johann Goethe, english poet, wrote this line (don't know what poem anymore).
3: Another good one. "Beliefs are dangerous. Beliefs allow the mind to stop functioning. A non funtioning mind is clinically dead. Believe in nothing." Bill Hicks