or Supreme Consciousness, read upanishads and Brahma sutras.
reference to 5 types of people
From Rig veda :-
Of those who dwell upon the earth. (1-7-9)
Bestow, ye Asvins, upon us. (8-9-2)
Lords of the Fivefold. People, these, Indra and Agni, we invoke. (5-86-2)
Wise, Youthful, Master of the house. (7-15-2)
And over the Five Races let our glory shine high like the realm of light and unsurpassable. (2-2-10)