I'm a critic. That means you are a writer. So, yes, you have to make yourself an authority on whatever subject it's going to be. Music, movies, literature, whatever it's going to be, but what you really want to do is learn your trade by reading other writers. I think you have to read veraciously, especially people who have done what you have done to see how it's been done in the past; what works, what doesn't work.

Even my colleagues don't read classic criticism. And my feeling is that if you don't do that then you're not really practicing your craft. That's how you learn how to do it. You don't learn how to write about jazz just from listening to jazz. You learn how to write by reading the great writers and how they worked, the great music critics.

Jazz is for joy. It's for euphoria, it's for emotion, and anguish, and excitement, and all of the joys that great art can produce, and if it loses that, then it's lost everything.

I hate the idea of turning jazz into homework assignments. I would never have a quiz saying, "Who's the clarinetist on the Hot Five?" I don't care. If you like the clarinetist, you'll know who it is.

When I teach criticism, the first thing I say, and this sometimes pisses off younger - I mean, students, is that, opinions are the least part of criticism. We've all had the experience of going with a friend to a movie or a concert and you leave the theater and one of you loved it and one of you hated it, and that doesn't mean that one of you is an idiot. That's the way things work.

Bing Crosby said that Armstrong is "the beginning and the end of music in America," and he wasn't far wrong.

Humility is a very important trait in a critic.