Being beautiful has nothing to do with physical appearance. It's your character as a person. Beautiful has nothing to do with looks. It has everything to do with how you are as a person and how you make others feel about themselves.
Beauty is beneath the skin. It's the true essence of who you really are.
You do have to look inside because so many people including myself have fallen for Beauty and not looked far enough inside to make a true perception of some people.
To me beauty is something that you control. How kind you are, your outlook on life. Physical beauty is out of people's control (and also in the eye of the beholder) but kindness, attitude, empathy, those are real things that people can develop.
Beauty is more inside than out. You can be beautiful on the outside and ugly on the inside and visa versa. Beauty is in the eye of the beholder.