Be who you are and say what you feel because those who matter don't mind, and those that mind, don't matter.
Being who you are at heart, and letting people know how you really feel about things, are two of the most substantial values a person can possess in their lifetime. In society we are judged immensely by our peers, which makes it very difficult for many people to do what their heart tells them to do, and to say what their heart tells them to say, because of the fear that people will judge them and discourage them. In order to possess these strong qualities usually requires a lot of heart supplemented with a lifetime of personal development.