It may be suggestive of what this song is about that I almost titled it "What does 'Doubt' by Blurryface mean?" "Doubt" by Twenty One Pilots seems as though it actually could have written by Tyler Joseph's alter-ego Blurryface as it recounts several of his fears and begs God to not "forget about me." The song is slow and methodical and iconic of the fears and anxieties that Tyler is dealing with in this album.