There is a very good definition of wabi-sabi here. In short though, it is the appreciation of beauty in the transitory and imperfect. I have always been drawn to such subjects in my photography. After Z gave me a lovely book she had decorated for my birthday, the craft paper pages inspired me in a wabi-sabi direction for some visual journalling. I had submitted them somewhere so couldn't share before. The bad news is they weren't chosen, the good news is that now I can show and tell. Anyway for me it is a really big thing just to submit them, a year ago I wouldn't have dared.