Teachers, should they charge?

[Guest]

It's really difficult to say if a teacher should charge or not. Like if someone writes a book it costs money to print it, so it's not feasible to do this for free. Share the knowledge written in a book with others for a nominal fee. I think it is okay. However, when I see teachers charging for expensive retreats in the thousands then I do wonder about the authenticity of a teacher and what they're selling. I guess I believe most knowledge should be free, esp if it's word of mouth. But I don't have a problem with a sale of a book, or a nominal cost for a service.