Yoga Sutra 1:15 The consciousness of self-mastery in one who is free from craving for objects seen or heard about is non-attachment.
Annotation by Sri Swami Satchidananda (excerpts):
Another Yoga teacher visited his IYI and asked him, “Don’t your students ask for something more? In my classes, if I don’t teach something new each class, they say ‘What is this? We paid you and got this yesterday.”
Then my child said “We don’t sell Yoga; we just teach for our joy. The people contribute as they want. There’s no business here, but rather the heart is working.”
We just spend a little happy time in the name of Yoga. Yes, that is the secret. There is joy in being together, that’s all. So that is the life of detachment. There is no expectation. They don’t feel they are losing their money and I don’t feel that I am gaining their money. We pool our money, our energy, and our ideas. And that is yoga.