Shah's reply was:
There are a lot of reasons. But if we are talking about the teacher who has disciples, it’s because I feel no need for an admiring audience to tell me how wonderful I am or to do what I say. I believe that the guru needs his disciples. If he had a sufficient outlet for his desire to be a big shot or his feeling of holiness or his wish to have others dependent on him, he wouldn’t be a guru.
I got all that out of my system very early and, consistent with Sufi tradition, I believe that those who don’t want to teach are the ones who can and should. The West still has a vocation hang-up and has not yet discovered this. Here, the only recognized achiever is an obsessive. In the East we believe that a person who can’t help doing a thing isn’t necessarily the best one to do it. A compulsive cookie baker may bake very bad cookies.