Chris's comment inspires my imagery of languages .
The interesting thing is that the opposite word of diversity is universe. Diversity means to have various character and apparences. On the other hand, univers means to unify and the same contents and similar figures.
Look at the sky. Universe is shaped by various planets, keeping the balance of well organized by the law of gravitation. The night sky always make people feel happy. Why? because it is the harmony of diversity and universe.
Here you might remember the word, university as a school. If it was a place where various people get together to learn, it would be more beautiful.
Good topic, Kia. Thanks! My comments might go off your intention though.
What you said that can we say some things are universally beautiful?
Yes, we can say beautiful minds and pure hearts which Adaeze said are universal.
What are beautiful minds and pure hearts? We always need but often lose them.