A: Have you seen Mary recently? She seems to have married into money.

B: Indeed she did. Her new apartment on top of a high-rise building speaks volumes about her luck.

Note: If something speaks volumes, it reveals a lot, even though what is revealed is often not specified (because the answer is readily inferable). First used in the 1800s, this idiom uses “volumes” in the sense of “the information contained in volumes of books.” The idiom means “to reveal or indicate a great deal about someone or something.”