Lesson 1 Fear is a very painful emotion. It is important for us to remember not to needlessly say things to arouse fear in others. We sometimes do this when we hear a problem, exaggerate it, and share it hysterically with others. E.g. if there are financial problems in a country, we will tell people the country is falling apart. Lesson 2 We need to be careful to not needlessly spread predictions of doom (particularly if you are a person who has a big influence on a lot of people). Differentiate between informing people so they can make constructive plans vs causing unnecessary anxiety.
(Lessons taken from The Power of Words by Rabbi Zelig Pliskin)