civility costs nothing

https://tts.langeek.co/read?text=Y2l2aWxpdHkgY29zdHMgbm90aGluZw&hash=967e94c2c284eda8e1aa2629bdfc1b2bb205f237&lang=en&cache-only=0&driver=googletts

Master English proverbs that depict politeness and etiquettes, like "use soft words and hard arguments" and "civility costs nothing".