Most anxiety has a simple cause: we are spending our energy on the wrong category of problems.
There are three kinds of matters in life: your own affairs, other people’s affairs, and matters beyond human control. The rule is simple — and hard to practice: let others handle their matters, let heaven handle its matters, and focus your energy on solving your own.
Anxiety about what someone else should do, or about what the universe might bring, is energy spent outside your own domain. The moment you return to your own responsibilities — and genuinely tend to them — peace becomes available again.
Not as a reward. As a natural consequence.