Why are we so driven to seek something beyond the present moment when teachings say we should just "be"?

How does fear of the unknown contribute to making people angry at things they don't understand?
What's a hidden personal cost of always controlling your true feelings?
Why do I keep falling for unavailable men, narcissists, people who use me when I know the signs? I leave instantly when I see it clearly, but what about me attracts only those types?