"Art is harmony." - Seurat.
When applied to all that is beautiful, this sentence carries a great deal of weight. I think that everything worth achieving in life carries with it the goal of being harmonious in some way, whether that means being dissonant or negative in actuality. The randomness of something is sometimes order on a higher level (Sonic Youth?).
This sentence is what I've decided will drive my decisions in the future. It gives reason to a lot of things I do -- when I'm programming, I often have to argue why I think coding things in an abstract way, using good design decisions is justified in projects that I'll never have to work on again. Why do it? I think it's all about that pursuit of perfection. One has to consistently strive for this to able to get anywhere near it -- and making things as harmoniously as you can gives one reason.