Lyric discussion by nofamelost 

Cover art for When In Doubt lyrics by Thousand Foot Krutch

Yeah, it seems to be growing up and comming out of the bubble that school places around kids. He starting to ask some deeper, philosophical questions and realizing that what he has in his life is not satisfying these questions. This doesn't say anything about Jesus, it just says that what he had inside is bubble was not everything that life is.