Thoughts are energy. Thoughts that you dwell on grow and can become thought forms where these thoughts now seem to take on a life of their own.
Seth has pointed out many times that our brains are wired for survival ... hence our brains are wired to focus on potential negative outcomes ... which of course makes those probabilities grow.
Shifting the focus from brain to heart is a great way to counter this tendency. The HeartMath Institute (https://www.heartmath.org/) has done extensive research in how to shift the focus to love and positive feelings.
“Many depressives concentrate almost devotedly upon the miseries of the world – the probable disasters that could bring about its end. They remind themselves that the planet is overpopulated, and project into the future the most dire of disasters, man-made and natural.
“Such thoughts are bound to cause depression. They are also painting a highly prejudiced view of reality, leaving out all matters concerning man’s heroism, love of his fellow creatures, his wonder, sympathy, and the great redeeming qualities of the natural world itself. So such people must change their focus of attention.
“The other creative, positive, achieving portions of life are ever present, and thoughts of them alone can bring refreshment and release from tension.”