I can relate to this song so much and I love it its got such an amazing tune and the lyrics are so beautiful, however depressing they may be. Anyway to understand this song fully you kinda need some back story from the whole album so basically the black parade is a concept album about a character referred to as 'the patient', he is dying from cancer and the whole album is about his last period of time on earth, this song is based toward the end of the album when he is nearing death, this song is about him completely losing interest in life, becoming 'disenchanted' by it. He doesn't see the point in his life anymore, despite any time he ever felt any optimism about it. This song is beautiful and Gerard is such a wordsmith and the whole band, even though it is gone now (*cries*), helped so many people and created some beautiful songs yeah I don't even know what I'm talking about anymore so bye I'm gonna shut up.