"Language, Zuko," he admonished. mostly to buy time to get his own emotions under control.

"Aside from if we do or do not remember, there are somethings that should not have been kept secrets. There are reasons, sometimes to keep a large secret. But Azula does not have the experience necessary to make such a decision." Which was the far far politer version of what he actually wanted to say. "It was not hers to make. The question is, now, Zuko, what do we do with what we now know?"