Don't quite get why the question of what is quality was so difficult for him. Quality is simply the space between intention and object or action. If the object meets the need well it has high quality, if not then not. He never comes out and states this simplest of truths but this is probably because he has too much faith in his readers? I don't know. 50 out of 50 stars.
Man was made for joy and woe
Then when this we rightly know
Through the world we safely go.
Joy and woe are woven fine
A clothing for the soul divine.