[FN#15] "If a wise man hold his body with its three parts (chest, neck, and head) erect, and turn his senses with the mind towards the heart, he will then in the boat of Brahman cross all the torrents which cause fear.
"Compressing his breathings let him, who has subdued all motions, breathe forth through the nose with the gentle breath. Let the wise man without fail restrain his mind, that chariot yoked with vicious horses.
"Let him perform his exercises in a place level, pure, free from pebbles, fire, and dust, delightful by its sounds, its water, and bowers; not painful to the eye, and full of shelters and eaves.
"When Yoga, is being performed, the forms which come first, producing apparitions in Brahman, are those of misty smoke, sun, fire, wind, fire-flies, lightnings, and a crystal moon.
"When, as earth, water, light, heat, and ether arises, the fivefold quality of Yoga takes place, then there is no longer illness, old age, or pain for him who has obtained a body produced by the fire of Yoga.
The first results of Yoga they call lightness, healthiness, steadiness, a good complexion, an easy pronunciation, a sweet odour, and slight excretions "(Cvet. Upanisad, ii. 8-13).
"When the five instruments of knowledge stand still together with the mind, and when the intellect does not move, that is called the highest state.
"This, the firm holding back of the senses, is what is called Yoga.
He must be free from thoughtlessness then, for Yoga comes and goes"
(Katha Upanisad, ii. 10, 11).
"This is the rule for achieving it (viz., concentration of the mind on the object of meditation): restraint of the breath, restraint of the senses, meditation, fixed attention, investigation, absorption-these are called the sixfold Yoga. When beholding by this Yoga, be beholds the gold-coloured maker, the lord, the person, Brahman, the cause; then the sage, leaving behind good and evil, makes everything (breath, organs of sense, body, etc.) to be one in the Highest Indestructible (in the pratyagatman or Brahman) " (Maitr. Upanisad, vi. 18).
"And thus it has been elsewhere: There is the superior fixed attention (dharana) for him-viz., if he presses the tip of the tongue down the palate, and restrain the voice, mind, and breath, he sees Brahman by discrimination (taraka). And when, after the cessation of mind, he sees his own Self, smaller than small, and shining as the Highest Self, then, having seen his Self as the Self, he becomes Self-less, and because he is Self-less, he is without limit, without cause, absorbed in thought. This is the highest mystery—viz., final liberation " (Maitr. Upanisad, vi. 20).