"The only difference between a well reasoned argument about a metaphysical subject and a badly reasoned one is the complexity of the portrait of the author and of his ideas. There is no difference in their value outside of that. Complex sophistry remains sophistry.
All art is sophistry."

"Something can be judged a work of it art if its arguments are rendered with an idiosyncratic subtlety beyond what is necessary to communicate its ideas, and which may even oppose them, but which so colors our perceptions that we can not separate the sensibility from the idea without feeling a loss.
Subtlety beyond necessity but not without purpose."

Quoting myself from notes somewhere. And the second one posted here a few months ago.