The value of an idea has nothing whatsoever to do with the sincerity of the man who expresses it. Indeed, the probabilities are that the more insincere the man is, the more purely intellectual will the idea be, as in that case it will not be coloured by either his wants, his desires, or his prejudices.
I learned some classical music history, which I had done quite a bit at of Performing Arts. But I got some more with a great teacher named David Noon, who I've been in contact with quite a bit in recent years.