It cannot be too strongly emphasized that this is the moment, and the earliest moment, when it becomes desirable to initiate the boy or girl into the mysteries of religion. That it is the best moment is indicated by the well-recognized fact that the immediately post-pubertal period of adolescence is the period during which, even spontaneously, the most marked religious phenomena tend to occur.[173] Stanley Hall seems to think that twelve is the age at which the cultivation of the religious consciousness may begin; "the age, signalized by the ancient Greeks as that at which the study of what was comprehensively called music should begin, the age at which Roman guardianship ended, at which boys are confirmed in the modern Greek, Catholic, Lutheran and Episcopal Churches, and at which the Child Jesus entered the Temple, is as early as any child ought consciously to go about his Heavenly Father's business."[174] But I doubt whether we can fix the age definitely by years, nor is it indeed quite accurate to assert that so early an age as twelve is generally accepted as the age of initiation; the Anglican Church, for example, usually confirms at the age of fifteen. It is not age with which we ought to be concerned, but a biological epoch of psychic evolution. It is unwise to insist on any particular age, because development takes place within a considerably wide limit of years. I have spoken of the introduction to religion at puberty as the initiation into a mystery. The phrase was deliberately chosen, for it seems to me to be not a metaphor, but the expression of a truth which has always been understood whenever religion has been a reality and not a mere convention. Among savages in nearly all parts of the world the boy or girl at puberty is initiated into the mystery of manhood or of womanhood, into the duties and the privileges of the adult members of the tribe. The youth is taken into a solitary place, for a month or more, he is made to suffer pain and hardship, to learn self-restraint, he is taught the lore of the tribe as well as the elementary rules of morality and justice; he is shown the secret things of the tribe and their meaning and significance, which no stranger may know. He is, in short, enabled to find his soul, and he emerges from this discipline a trained and responsible member of his tribe. The girl receives a corresponding training, suited to her sex, also in solitude, at the hands of the older women. A clear and full description of a typical savage initiation into manhood at puberty is presented by Dr. Haddon in the fifth volume of the _Reports of the Cambridge Anthropological Expedition to Torres Straits_, and Dr. Haddon makes the comment: "It is not easy to conceive of more effectual means for a rapid training."