Worrying

I wanted to write this down because is just came up with my mother, and I had a rather succinct answer:

Q: If I'm not worrying, how do I know I've done what I should?
A: Worrying makes you feel as if you done something when you have done nothing, it makes you feel as if you have control when you have none. The better response is to do what is reasonable for you to do and then trust.