Imperfection is in some way essential to all that we know of life. It is the sign of life in a mortal body, that is to say, of a state of process and change. Nothing that lives is, or can be, rigidly perfect; part of it is decaying, part nascent. […] And in all things that live there are certain irregularities and deficiencies, which are not only signs of life but sources of beauty.
John Ruskin, The Lamp of Beauty