Lesson 1 Everyone needs to be valued and it is a tremendous kindness to express appreciation to others. Hard work becomes much easier when you are appreciated for your efforts. A person who uses their power of speech to enhance the lives of others will not use this power for destructive purposes. Lesson 2 If you have pained others with words in the past (by speaking about or to them negatively), try to make up for it by taking upon yourself to do many verbal acts of kindness.
(Lessons taken from The Power of Words by Rabbi Zelig Pliskin)