But we expect even more of this derivation of the group from the primal horde. It ought also to help us to understand what is still incomprehensible and mysterious in group formations--all that lies hidden behind the enigmatic words hypnosis and suggestion. And I think it can succeed in this too. Let us recall that hypnosis has something positively uncanny about it; but the characteristic of uncanniness suggests something old and familiar that has undergone repression.[56] Let us consider how hypnosis is induced. The hypnotist asserts that he is in possession of a mysterious power which robs the subject of his own will, or, which is the same thing, the subject believes it of him. This mysterious power (which is even now often described popularly as animal magnetism) must be the same that is looked upon by primitive people as the source of taboo, the same that emanates from kings and chieftains and makes it dangerous to approach them (_mana_). The hypnotist, then, is supposed to be in possession of this power; and how does he manifest it? By telling the subject to look him in the eyes; his most typical method of hypnotising is by his look. But it is precisely the sight of the chieftain that is dangerous and unbearable for primitive people, just as later that of the Godhead is for mortals. Even Moses had to act as an intermediary between his people and Jehovah, since the people could not support the sight of God; and when he returned from the presence of God his face shone--some of the _mana_ had been transferred on to him, just as happens with the intermediary among primitive people.[57]