יֵ֣שׁ בּ֭וֹטֶה כְּמַדְקְר֣וֹת חָ֑רֶב וּלְשׁ֖וֹן חֲכָמִ֣ים מַרְפֵּֽא׃
There is that speaketh like the piercings of a sword; But the tongue of the wise is health.
Read kabbalistic (mystical) interpretation of Proverbs 12:18: and classical mystical sources.