Worry can paralyze us, mentally, emotionally, physically, financially, and spiritually. The perspective of worry blinds us to the wonderful realities of God's loving care. Often, we worry about things that has not happened yet, nor exists (an example of anxiety) and we imagine situations that are usually not realities.
One of the major reasons why we worry is that we do not appreciate the Giver of life or the life He has given us. Our lack of appreciation impairs our perpective and dispostion more than we realize,
When we are sick, we worry about getting well and fail to know, educate ourselves, or realize that God made our bodies with an estimate of 60 trillion cells that are actively working to bring our bodies healing. The worry (thinking) actually hinders the healing process, ("Rx for Worry-A Thankful Heart,"James P. Gills, M.D., 1995).