Lyric discussion by yewbarrow 

Cover art for Be Gone lyrics by British Sea Power

OK, so I see how "Floréal" and the guillotine might refer to the French Republican Calendar and the French Revolution, but how do the rest of the lyrics fit in?

'Agonic lines' and the things about the heart and the liver don't seem to bear any relation to it.

And the indigo to crystalline bit seems to refer to the "Indigo children" new age thing.