The degree of suggestibility, that is of willingness to yield to such propositions for action and of inability to resist them, is indeed different from man to man. We all know the stubborn persons who are always inclined to resist whatever is proposed to them and who do not believe what is told them, and we know the credulous ones who believe everything that they see printed. But the degree of suggestibility changes no less from hour to hour with the individual. In a state of fatigue or under the influence of alcohol or under the influence of strong emotions, in hope and fear, the suggestibility is reënforced. The highest degree of suggestibility is that mental state which we call hypnotism, in which the power to resist the proposed idea of action is reduced to a minimum. But the chief factor in making us suggestible is the method by which the idea of action is proposed, and in psychology we speak of suggestion whenever an action is proposed by methods which make the mind yielding. It certainly is not objectionable to exert suggestive influence. Suggestions are the leading factors in education, in art, and in religion. The authoritative voice with which the teacher proposes the right thing has a most valuable suggestive power to suppress in the child the opposite misleading impulse. But surely suggestions can become dangerous and destructive. If actions are proposed in a form which paralyzes the power to become conscious of the opposite impulses, the voice of reason and of conscience is silenced, and social and moral ruin must be the result.