(_a_) Manu, as already remarked, comes from the root _man_, to think, hence a “thinker.” It is from this Sanskrit word very likely that sprung the Latin _mens_, Mind, the Egyptian _Menes_, the “Master‐Mind,” the Pythagorean _monas_, or conscious “thinking unit,” mind also, and even our _manas_ or mind, the fifth principle in man. Hence these Shadows are called _Amânasa_, “Mindless.” With the Brâhmans, the Pitris are very sacred, because they are the Progenitors,(209) or Ancestors of men—the first Manushyas on this Earth—and offerings are made to them by the Brâhman when a son is born unto him. They are more honoured and their ritual is more important than the worship of the Gods.(210) May we not now search for a philosophical meaning in this dual group of Progenitors? The Pitris being divided into _seven_ Classes, we have here the mystic number again. Nearly all the _Purânas_ agree that three of these are Arûpa, formless, while four are Corporeal; the former being intellectual and spiritual, the latter material and devoid of intellect. Esoterically, it is the Asuras who form the first three Classes of Pitris—“born in the Body of Night”—whereas the other four were produced from the “Body of Twilight.” Their Fathers, the Gods, were doomed to be born fools on Earth, according to the _Vâyu Purâna_. The legends are purposely mixed up and made very hazy: the Pitris being in one the Sons of the Gods, and, in another, those of Brahmâ; while a third makes them instructors of their own Fathers. It is the Hosts of the four material Classes who create men simultaneously on the seven Zones.