How is Strickland compared to Beethoven in the novel, The Moon and Sixpence?

Like Beethoven composing a symphony while deaf, Strickland continues painting long after he has gone blind. Even though he can not see the masterpiece inside his hut, Strickland can see it with his mind's eye, and he knows that in his final chance, he has at last communicated the beauty and wonder of his spirit, and he can die happy.