It is in the eye of the beholder. We mean by this a pig does not see the flower bed as a thing of beauty, but a source of food. We do not share much with the pig. It forces the comparison though. If we see it as beautiful then ask of its provenance. Where did it get the beauty? Make a list in your mind of things you find beautiful and explore why you think it is beautiful. Listen to the music, and if it is beautiful find out where it came from, and ask if it is the individual sounds, or the combination of notes and timing and melodies and harmonies. Try to compose it. Stick at it until you duplicate it, or come up with a similar sound. If you fail to produce anything, admit is requires a focus or talent you do not have, and marvel at those who have it. Then ask where did they get it.
The answer will usually be, after much sweat and tears. They honed their creative skills. Practice over and over and build the expertise. Then enjoy what you can produce. If you know another way than please share, for what we all want to do, is produce something beautiful.