"You don't always need to know the causes to feel anxiety, and as it turns out, many times you don't need to know the causes to solve it either."
I would agree with that statement. Interestingly, I think some of the methods used to overcome psychedelic fear may be helpful with general anxiety too. Simple things like a change in set and setting can have a great effect on changing a bad mood despite its cause.
RE: Anxiety Mastery - Address, Overcome, and Transmute your Anxiety