What a lot of people don't know is that a lot of those songs was like codes and messages, you know? Like 'Swing Low, Sweet Chariot' was, like, 'Swing low, 'cause the Underground Railroad is coming.' There was probably some slaves who probably tried to write spirituals but just really wasn't that good at concealing the message. It'd be like, 'Hey, Rascals, I hear you been working on a spiritual. Won't you sing it for everybody?' 'Alright, master. Oh, tonight at 8:30/Gonna get some shovels and bash white folk in the head/What time?/8:30/Do what?/Gonna kill white folk.'