I think that this song is about have the strength and patients to get through bad times. We as humans get angry easily and its hard to be patient when the odds are stack against us. The lines "Anger and hatred are their oars, revenge their vessel" and "This is your conscience speaking, spare your spirit" are saying that if what let anger and hatred drive us then we can't let spare us spirit the pain of the bad times. My opinion.
I think that this song is about have the strength and patients to get through bad times. We as humans get angry easily and its hard to be patient when the odds are stack against us. The lines "Anger and hatred are their oars, revenge their vessel" and "This is your conscience speaking, spare your spirit" are saying that if what let anger and hatred drive us then we can't let spare us spirit the pain of the bad times. My opinion.