This is a great point, and one I think could make more sense if I (clumsily) update the saying to "Be true to yourself". I agree with the writer that most of us probably don't need to express every thought, no matter how negative or insulting, as it doesn't usually add a lot of benefit to our lives or others. However, I believe knowing what you want out of life, whether it's career, family, or hobbies, is definitely an important way to be happy. But, usually this doesn't negatively affect others.
