Charles Godfrey Leland

Now, as regards curing disorders, I beg the reader to specially observe that this, like many other works, depends on the state of the mind; nor can it be undertaken with hope of success unless the operator has by previous practice in easy experiments succeeded in perfectly convincing himself that he has acquired control of his will. Thus having succeeded in willing himself to work all day without fatigue, or to pass the day without being irritable, let him begin to consider, reflect and realize that he can make himself do this or that, for the more he simply induces the belief and makes himself familiar with it, the stronger and more obedient his Will will be.