Everyone is in a negative or pessimistic mood once in a while. It’s a perfectly normal state of mind when it can be overcome. However, when negative moods are excessive, they can be detrimental to reaching full potential and developing and maintaining effective interpersonal relationships. Optimistic people are a pleasure to be with, see the bright side of every situation, and look at the possibilities in any challenge life presents. On the other hand, people who are pessimistic drain others’ energy. Negative people complain about everything and are pessimistic about any challenges life presents.