"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.