The statement may be taken to imply that no tic abandoned to itself ever vanishes completely, but the generalisation is inaccurate. Systematic treatment may lead not only to amelioration, but also to cure. Certain tics of children are by nature ephemeral, and disappear spontaneously, never to return. It is easy to understand how that may be. Psychical evolution and physical evolution alike are liable to singular variations. Hence the development of a tic in early life is no reason for despair, seeing that we are not justified in the assumption that the volitional debility which it proclaims is to persist. We must believe that volition may be reinforced, and we must further the attainment of this end by every means at our disposal. Negligence on our part is highly culpable. Tics of childhood are curable: we draw attention to the fact afresh. Their spontaneous dissolution is not unknown, but parents must not consider the question merely one of time. They must impress on their children the sobering effect of good behaviour and decorum. Discipline of this kind may be a long and delicate task, but to condone indulgence in untimely movements, on the pretext that they are merely quaint, is a mistake fraught with the gravest consequences. When a child holds its knife or fork incorrectly, or puts its elbows on the table, or its finger in its nose, we feel that the habit is displeasing; but how much more serious the outlook if the trick consists in biting the lips, or tossing the head, or blinking the eyes! The former is an offence against good taste; the latter is a tic in embryo. It may be said, as a general rule, that the chances of spontaneous cure are in inverse proportion to the age of the patient and the duration of his tic. Tics of adult life may also be cured, less often, it is true, than in the case of children. Oppenheim gives the history of a woman with a rebellious facial tic of twelve years' duration, which ceased on the occasion of a certain happy event in the family life. Of course one wants to know whether it ever returned, for many so-called cures are simply remissions. T. had suffered from torticollis for a whole year, but on the eve of her son's marriage it stopped entirely for three days, and she deemed the cure permanent; it was not long, unfortunately, ere she underwent a relapse. Brissaud[192] quotes an instructive case of temporary cessation of tic. A patient afflicted with mental torticollis of three years' standing learned that his son had been injured and had been removed to hospital to undergo an operation. In an instant his torticollis disappeared, but a reassuring report from the surgeon a few days later was followed by a recrudescence of the condition.