She could not see that it was her very expectation, and giving voice to it, in her hourly worryings and in that command that they come down, that caused the accident.

She, herself, alone was to blame; her unnecessary worry was the cause of her daughter's broken arm.
Christ's constant incitement to his disciples was "Be not afraid!" He was fully aware of the fact that Job declared: "The thing which I greatly feared is come upon me." Hence, worrying mother, curb your worry, kill it, drive it out, for _your child's sake_.

You claim it is for your child's good that you worry.

You are wrong.

It is because you are too thoughtless, faithless, and trustless that you worry, and, if you will pardon me, _too selfish_.