Learn to discern the dirty fears from the clean ones. It’s not difficult any moment
when you are experiencing anxiety, check if there’s true, immediate danger.
Source
The majority of the time you’ll find there isn’t. Also, when you experience clean fear
you’ll find that you are totally present and in the moment. When you cross a busy
road, your mind is aware as you cross. You won’t be wondering what to eat for lunch
as you cross the road!
When your mind is busy with dirty fear you’re not completely present. When
you’re worrying about your partner being unfaithful, or running out of money, or
being retrenched, your mind is busy with some future possibility; it’s not dealing
with the present moment.