I never use a score when conducting my orchestra. Does a lion tamer enter a cage with a book on how to tame a lion?

I never use a score when conducting my orchestra. Does a lion tamer enter a cage with a book on how to tame a lion?

我指挥管弦乐队时从不使用乐谱。驯狮师会带着一本关于如何驯服狮子的书进入笼子吗?

-- Dimitri Mitropoulos 米特罗普洛斯