Board Thread:General Discussion/@comment-4806374-20131117085439

When his zanpakuto was reforged he said: "Zangetsu, I won't ask you to 'lend me your power' any more. And I won't tell you 'don't get in my way'. I won't even say 'let us fight together'. I'll fight for myself. Thank you, Zangetsu. You are me."

Can some explain what he means by this? 