Worrying is using your imagination to create something you don't want.
Being happy is the cornerstone of all that you are! Nothing is more important than that you feel good! And you have absolute and utter control about that because you can choose the thought that makes you worry or the thought that makes you happy; the things that thrill you, or the things that worry you. You have the choice in every moment.
I worry that I'll go down to the dock, and that my ship will have already come and gone. I'll miss my boat." And we say, another boat, another boat, another boat. You have no idea how many boats are coming to your dock. It's a steady stream, and it doesn't matter how many of them you've missed.
Worrying is imagining that which you don't want.