Contrast
There is one simple thing I remember from an art class in school days. It can be summarized this way: I didn’t beleive that a thing in dark background looks brighter. And that unresolved question informed some my decisions later while experimenting with that. But it is something that is still not resolved in a way.
Today while I was walking around the city there were three occasions when I just got kind of surprised by beauty of some view. And in these occasions preceding view was very different and in a way contrasted to the next.
So I start to see some of the effect in practice. And it requires active attention and is not given.
It seems seing some aspects of beauty kind of sets a standard that you use. And then you try see other standards at less conspicuous levels. And this is one of paths to explore the medium.