The more you engage in joyful and grateful self-talk, the more your mind will be free from worry.
Some people tell themselves, "It’s my nature to worry." But the truth is that no one is born a worrier. A person might have started worrying at a young age and have many early memories of worrying. A person might find it very difficult not to worry. But this isn’t someone’s basic nature. Worry is essentially self-talk about something negative that you hope won’t happen. You feel anxious and distressed about the possibility.
One way out of the worry pattern is to think of potential solutions. Whenever you worry about something, imagine three or more alternate outcomes.
A happy and joyful person has mastered the art of thinking in patterns that create happiness and joy. Let this be your mind.
(from Rabbi Zelig Pliskin’s book: "Conversations With Yourself", pp.258-9) [Artscroll.com])