But, see, that's part of the hiding away. If you're always worrying about hurting other people, it'll give that fear strength.

[He scolds her lightly, before patting her on the shoulder again and floating back.]

It's like with any skill! If you keep thinking of how you might mess up with it, you're going to mess up and you're going to feel guiltier for it. It's better to just keep trying until you can control it entirely.