Contemplating Him who has neither beginning, middle, nor end-the One, the all-pervading, who is wisdom and bliss, the formless, the wonderful, whose consort is Uma, the highest Lord, the ruler, having three eyes and a blue throat, the peaceful-the silent sage reaches the source of Being, the universal witness, on the other shore of darkness.
Atharva Veda, Kaivalya Upanishad 7. ve, 764
There is no one greater in the three worlds than the guru. It is he who grants divine knowledge and should be worshiped with supreme devotion.
Atharva Veda, Yoga-Sikha Upanishad 5.53. yt, 26
Abiding in the midst of ignorance, but thinking themselves wise and learned, fools aimlessly go hither and thither, like blind led by the blind.
Atharva Veda, Mundaka Upanishad 1.2.8. upm, 77
With this (i.e. the principal vital breath) one does not discern what pleasant-smelling and what is foul-smelling; for it is unsmitten by evil. Whatever a person eats or drinks with it (the principal vital breath) supports the other pranas. That is why they depart when, at the time death, it no longer supports them by eating and drinking. It opens the mouth at the time of death as if the dying man wished to eat.
Sama Veda, Chandogya Upanishad I, II – Meditation on Om as the Prana, 9
Angira meditated on the Udgitha as the principal prana. people call it (i.e. the prana) Angiras, because it is the essence (rasa) of the limbs (anga). Brihaspati meditated on the Udgitha as the principal prana. People call it (the prana) Brihaspati, because speech is great (brihat) and it is the lord (pati) of speech. Ayasya meditated on the Udgitha as the principal prana. People call it (the prana) as Ayasya; because it comes (ayate) from the mouth (asya). Vaka, the son of Dalbhya, knew it (the prana); he became the udgatri priest of the sacrificers dwelling in the Naimisha forest. By singing the Udgitha he fulfilled all their desires.
Sama Veda, Chandogya Upanishad I, II – Meditation on Om as the Prana, 10-13
