The type of thought we entertain has its effect upon our energies and to a great extent upon our bodily conditions and states. Strong, clear-cut, positive, hopeful thought has a stimulating and life-giving effect upon one's outlook, energies, and activities; and upon all bodily functions and powers. A falling state of the mind induces a chronically gloomy outlook and produces inevitably a falling condition of the body. The mind grows, moreover, into the likeness of the thoughts one most habitually entertains and lives with. Every thought reproduces of its kind.
Says an authoritative writer in dealing more particularly with the effects of certain types of thoughts and emotions upon bodily conditions: "Out of our own experience we know that anger, fear, worry, hate, revenge, avarice, grief, in fact all negative and low emotions, produce weakness and disturbance not only in the mind but in the body as well. It has been proved that they actually generate poisons in the body, they depress the circulation; they change the quality of the blood, making it less vital; they affect the great nerve centres and thus partially paralyse the very seat of the bodily activities. On the other hand, faith, hope, love, forgiveness, joy, and peace, all such emotions are positive and uplifting, and so act on the body as to restore and maintain harmony and actually to stimulate the circulation and nutrition."
The one who does not allow himself to be influenced or controlled by fears or forebodings is the one who ordinarily does not yield to discouragements. He it is who is using the positive, success-bringing types of thought that are continually working for him for the accomplishment of his ends. The things that he sees in the ideal, his strong, positive, and therefore creative type of thought, is continually helping to actualise in the realm of the real.
We sometimes speak lightly of ideas, but this world would be indeed a sorry place in which to live were it not for ideas--and were it not for ideals. Every piece of mechanism that has ever been built, if we trace back far enough, was first merely an idea in some man's or woman's mind. Every structure or edifice that has ever been reared had form first in this same immaterial realm. So every great undertaking of whatever nature had its inception, its origin, in the realm of the immaterial--at least as we at present call it--before it was embodied and stood forth in material form.