authenticity is not needing external approval to feel good about your actions. Dont second guess or over analyse if you know the decisions you make are base according to your values and what you need. You will attract the right things to your life once you have a sense of who you are.
"Just be yourself. Let people see the real, imperfect, flawed, quirky, weird, beautiful, magical person that you are." So glad my fiance accepts me for who I am! http://weddingmusicproject.bandcamp.com/album/brides-guide-to-classical-wedding-music
I hope this is one thing I am able to teach my kids. Be an INDIVIDUAL don't worry about being like everybody else they are just jealous they are not as awesome and comfortable with their selves as you are simply being yourself all the time.