Lyric discussion by EyesSoBright 

Cover art for Who's Jon lyrics by Now It's Overhead

To me, it means that there are somethings that will always be kept inside of a person. The terrible things that can happen to you can't be let out, if they are, it makes them worse, or no one believes you...hence the "lie" but maybe I am interpretting it quite wrong and reading too far into it meshing it with my own life experiences.