Worryring process is a vicious circle, starting from lack of effort to clarify.
We are insecure, worried and anxious most of the time, but that is also a good sign of human-in-progress, of being alive, of living and embracing uncertainties.
When everything is crystal clear and we seem to be in total control, life is dead boring.
HOWEVER, regarding worry topic, the way David, author of Raptitude “analyzes” (by purely focusing on his feelings and try to draw conclusions from that) can’t compare with the systematic, persuasive book “How to stop worrying and start living” by Dale Carnegie. ( Ebook link in the comment)