My Mentor will always say, "Worry is the oldest child of Fear. It settles down upon one's mind, and crowds out all of the developing good things to be found there. Like the cuckoo in the sparrow's nest, it destroys the rightful occupants of the mind".
Laid there as an egg by its parent, Fear, Worry soon hatches out and begins to make trouble. In place of the cheerful and positive "I Can and I Will" harmony, Worry begins to rasp out in raucous tones: "Supposing'," "What if," "But," "I can't," "I'm unlucky," "I never could do things right," "Things never turn out right with me" and so on until all the minor notes have been sounded.
Worry makes one sick bodily, and inert mentally. It retards one's program, and is a constant stumbling block in our path upward.
The worst thing about Fear and Worry is that while they exhaust a great part of the energy of the average person, robs them off of every good thing there is, they give nothing good in return!
Nobody ever accomplished a single thing by reason of Fear and Worry. Fear and Worry never helped one along a single inch on the road to Success. And they never will, because their whole tendency is to retard progress, and not to advance it. The majority of things that we fear and worry about never come to pass at all, and the few that do actually materialize are never as bad as we feared they would be.
It is not the cares, trials and troubles of today that unnerve us and break us down—it is the troubles that we fear may come sometime in the future. Everyone is able to bear the burdens of today, but when he heaps on the burdens of tomorrow, the next day, and the day after that, he is doing his mind an injustice, and it is no wonder that after a bit he heaps on the last straw that breaks the back of the mental camel.
The energy, work, activity and thought that we expend on these imaginary "maybe" troubles of the future would enable us to master and conquer the troubles of each day as they arise!