SimchaMinute by Rabbi Avigdor Miller
This is how our sages acted: They spoke, but did so with... the greatest prudence. Whatever they said was calculated. Every word meant something, and Esther was able to foresee the effect of her words...
She understood that a certain word would bring a certain result — a specific expression of face, a particular tone of voice — and therefore she was prepared for her ordeal. — Esther's Secret