Lyric discussion by presdaddy 

Cover art for Simple Math lyrics by Manchester Orchestra

I think this song is about trying to come to terms with the fact that we'll never really know if god is something worth believing in.

i agree halfway but i think its more of coming to terms of just growing up in general, loss of innocence and getting used to it. and coming to terms with the fact that we'll never know if god is something worth believing in is just part of that.