To worry is to become accessible, unwittingly accessible. And once you worry you cling to anything out of desperation; and once you cling you are bound to get exhausted or to exhaust whoever or whatever you are clinging to.
My worrying, for instance, was a scene in which I looked at myself while I had the sensation of being boxed in. I call that worrying, It has happened to me a number of times after that first time.