Yes, we can revert to Cuch, the smartest one around. Helps everyone too.
As I think (Paws, you like to think too, are smart too, and creative, and a joy) about this issue, perhaps it comes to a chicken and egg question. What comes first? Stress? Fear? Worries? Brain chemistry? Childhood? Lack of trust in ourself? Anxiety? Panic? Depression? I'll put stress as a starter. But, as raindrops says, we are all different (but yet alike).