I find the saying “beauty is in the eye of the beholder” to be very discriminatory and problematic in the way it’s phrased. I understand that every person can be beautiful to another person when it comes to attraction in relationships, but there are humans out there are not due to their insides not being beautiful. This is something that requires being worked out, but I do believe that there is a limit to what can be fixed by modern therapy and has to be worked on from the inside.
Beauty for me is a person that has confidence and knows who and what they are. They acknowledge their own flaws, but do their best, because we’re not perfect, to accept and work on them as much as they can. They work through their flaws, but focus their confidence on their strengths without having too much of an ego.
I’m not someone that believes in religion and some would say that insides being beautiful needed to be spiritual, but I don’t believe that. I believe that someone has to be internally concrete in their own emotions and personality in order to work those things through. It depends individually on each person, but there has to be something worked out.