Fenster quotes Montaigne:

“The weakness of our condition makes it impossible for things to come into our experience in their natural simplicity and purity.  The elements we enjoy are corrupted, and the metals likewise; the gold must be debased by some other material to fit it for our service . . . Of the pleasures and the good things we have, there is not one exempt from some mixture of pain and discomfort . . . Toil and pleasure, very unlike in nature, are nevertheless joined by I know not what natural association.  Socrates says that some god tried to lump together and confuse pain and pleasure, but that, not being able to come out successful, he decided to couple them, at least by the tail . . . When I confess myself religiously to myself, I find that the best virtue has some tincture of vice . . . Man, in all things and throughout, is but patchwork and motley.”

From We Taste Nothing Pure

His ideas in action here.