He'll want to hang himself and threaten, to--don't you believe it.

It's nothing but nonsense.

Don't believe it; but still keep a sharp look-out, you never can tell, and one day he may hang himself.

It does happen with people like that.

It's not through strength of will but through weakness that people hang themselves, and so never drive him to an extreme, that's the first rule in married life.
Remember, too, that he's a poet.