This song seems pretty straightforward as far as a general meaning. The song is about someone who has been through a traumatic experience(s) that has changed him as a person. He is definitely extremely depressed "wash the sorrow from off my skin" and can’t get past the experiences he’s been through "wash the poison from off my skin."
He is a shell of the man he used to be; almost to his breaking point. So the "crack" is referring to his barely there self and "castle of glass" is referring to him being almost at his breaking point. That’s why it’s a castle of glass, it’s very easily broken.
But the "castle" also refers to his desire/hope to want to be back to his old self again. The castle is defending the last of himself that he has left and he is desperately searching for someone/something that will make him his old self/happy again.
This song seems pretty straightforward as far as a general meaning. The song is about someone who has been through a traumatic experience(s) that has changed him as a person. He is definitely extremely depressed "wash the sorrow from off my skin" and can’t get past the experiences he’s been through "wash the poison from off my skin."
He is a shell of the man he used to be; almost to his breaking point. So the "crack" is referring to his barely there self and "castle of glass" is referring to him being almost at his breaking point. That’s why it’s a castle of glass, it’s very easily broken.
But the "castle" also refers to his desire/hope to want to be back to his old self again. The castle is defending the last of himself that he has left and he is desperately searching for someone/something that will make him his old self/happy again.