We all change and the world is always changing, all we can do is our best to adapt to both. I'm mainly referring to consistency in sense of doing what you say and saying what you do. If you are going around telling people one thing and doing something else entirely, eventually they will think you are a fraud etc. It's about accepting ourselves and not feeling a need to hide from others. It isn't meant to hurt anyone, it's meant to help people realize that you don't have to be afraid to be authentic and accept yourself and it's also okay to admit when we're wrong.