So what is it - beauty?
You can learn from encyclopedias that beauty is a category that depends on the harmonic combination of some aspects of an object determining some category of perfection. That's it, quite a complicated definition. But you can get it that beauty is a collective characteristic. To understand beauty, one has to understand and assess some aspects…

What is a beautiful face then? And where are those very aspects of an object that tell us about the category of perfection? What do these aspects depend on and can they be objectively assessed?