Take a broken leg.

Of course the cure of a broken leg is affected by the state of the nervous system, since it depends upon the amount of vital energy, the state of the blood, and so on.

But there are distinct processes of change of tissue that are bound to take a certain fixed period.

You may--as has been proved over and over again in the mental laboratories--hasten and direct the action of the nervous energy, so that a man under hypnotic suggestion will improve more rapidly than a man who is not.

But no amount of suggestion can possibly effect a cure instantaneously.