This accumulation of potential subconscious reserve energy is a result of the evolution of man and the growing complexity of his life.
No man could, if he would, respond to all the impulses to muscular action aroused in him by sense-impressions. It would be still less possible for him to respond to every impulse to muscular action awakened from the past with the remembered thought with which it is associated.
Desire, interest, attention and the selective will must pick and choose among these multitudinous tendencies to action.
Here, then, is another fact that has immediate bearing upon your ability to carry out any ambition you may have. Your every action is the net result of selection among a number of impulses and inhibitory forces or tendencies.
The Threshold of Inhibition
As a general thing, consciousness is made up of a number of conflicting ideas, each with its associated feeling and its impulse to action. Just what you do in any particular case depends upon what mental picture is strongest, is most vivid in consciousness, and thus able to overcome all contrary tendencies.
As life becomes more and more complex, the number and variety of our sensory experiences increase correspondingly. And so it comes about, that we have untold millions of sensory experiences, carrying with them the impulses to muscular response, none of which, on account of the multiplicity of conflicting ideas, is ever allowed to find release and actually take form in muscular activity.
Hidden Strength