Hong was used to say his Taiji is like a garden. Everybody is welcome to come, have a look and take what he or she wants to take. If you cut a flower, it might last a week. If you can take the seeds, maybe in some years you’ll have your own garden.
Always teach everything, always present things in the same way. If someone understands, it has nothing to do with you. If somebody does not understand, don’t feel guilty: there’s nothing wrong with you and nothing wrong with him/her.