What is worry? And how can worry be conquered?

Dale Carnegie {whose books were sold next to any of the religious books} wrote a book “Stop Worrying and Start living“; But irony of human mind is that it has stopped living but has started worrying. So two imparative questions stand; What is worry? And how can worry be conquered?

 

“Worry is like a rocking chair, it keeps you very busy but leads you no were "
Best remedy to conquer worry IS " To substitue work with worry "