One of the main parts of the Yom Kippur service is the “Al Cheit”, when we recite two sins for each letter and lightly punch our hearts. If a person looks closely, he will see that 25% of the “Al Cheit”s are for sins relating to the mouth. This is an imporant area that everyone should work to improve.
4. Be kind to yourself. Speaking badly even about yourself is unethical.
הלכות שמירת הלשון 