Excerpted from: Autobiography of a Yogi, by Paramhansa Yogananda

The science of Kriya Yoga, mentioned so often in these pages, became widely known in modern India through the instrumentality of Lahiri Mahasaya, my guru’s guru. The Sanskrit root of Kriya is kri, to do, to act and react; the same root is found in the word karma, the natural principle of cause and effect. Kriya Yoga is thus “union (yoga) with the Infinite through a certain action or rite.” A yogi who faithfully follows its technique is gradually freed from karma or the universal chain of causation.

Kriya Yoga is a simple, psychophysiological method by which the human blood is decarbonized and recharged with oxygen. The atoms of this extra oxygen are transmuted into life current to rejuvenate the brain and spinal centers. By stopping the accumulation of venous blood, the yogi is able to lessen or prevent the decay of tissues; the advanced yogi transmutes his cells into pure energy. Elijah, Jesus, Kabir and other prophets were past masters in the use of Kriya or a similar technique, by which they caused their bodies to dematerialize at will.

Kriya is an ancient science. Lahiri Mahasaya received it from his guru, Babaji, who rediscovered and clarified the technique after it had been lost in the Dark Ages. “The Kriya Yoga which I am giving to the world through you in this nineteenth century,” Babaji told Lahiri Mahasaya, “is a revival of the same science which Krishna gave, millenniums ago, to Arjuna, and which was later known to Patanjali, and to Christ, St. John, St. Paul, and other disciples.”

Kriya Yoga is referred to by Krishna, India’s greatest prophet, in a stanza of the Bhagavad Gita: “Offering inhaling breath into the outgoing breath, and offering the outgoing breath into the inhaling breath, the yogi neutralizes both these breaths; he thus releases the life force from the heart and brings it under his control.” Kriya Yoga is mentioned twice by the ancient sage Patanjali, foremost exponent of yoga (in his famous Yoga Sutras).

The ancient yogis discovered that the secret of cosmic consciousness is intimately linked with breath mastery. This is India’s unique and deathless contribution to the world’s treasury of knowledge. The life force, which is ordinarily absorbed in maintaining the heart-pump, must be freed for higher activities by a method of calming and stilling the ceaseless demands of the breath.

The Kriya Yogi mentally directs his life energy to revolve, upward and downward, around the six spinal centers… which correspond to the twelve astral signs of the zodiac, the symbolic Cosmic Man. One-half minute of revolution of energy around the sensitive spinal cord of man effects subtle progress in his evolution; that half-minute of Kriya equals one year of natural spiritual unfoldment. The ancient rishis discovered that man’s earthly and heavenly environment, in twelve-year cycles, push him forward on his natural path. The scriptures aver that man requires a million years of normal, diseaseless evolution to perfect his human brain sufficiently to express cosmic consciousness.

One thousand Kriya practiced in eight hours gives the yogi, in one day, the equivalent of one thousand years of natural evolution. With the guidance of a guru, such yogis have carefully prepared their bodies and brains to receive the power created by intensive practice… A yogi who dies before achieving full realization carries with him the good karma of his past Kriya effort; in his new life he is harmoniously propelled toward his Infinite Goal. Through gradual and regular increase of the simple and “foolproof” methods of Kriya, man’s body becomes astrally transformed day by day, and is finally fitted to express the infinite potentials of cosmic energy.

Untying the cord of breath which binds the soul to the body, Kriya serves to prolong life and enlarge the consciousness to infinity. The yoga method overcomes the tug of war between the mind and the matter-bound senses, and frees the devotee to reinherit his eternal kingdom. The yogi offers his labyrinthine human longings to a monotheistic bonfire dedicated to the unparalleled God. This is indeed the true yogic fire ceremony, in which all past and present desires are fuel consumed by love divine…

Referring to yoga’s sure and methodical efficacy, Lord Krishna praises the technological yogi in the following words: “The yogi is greater than body-disciplining ascetics, greater even than the followers of the path of wisdom (Jnana Yoga), or of the path of action (Karma Yoga); be thou, O disciple Arjuna, a yogi!”

[In Chapter 37 of Autobiography, Babaji, in blessing Yogananda’s mission to the West, stated that] “Kriya Yoga, the scientific technique of God-realization,” he finally said with solemnity, “will ultimately spread in all lands, and aid in harmonizing the nations through man’s personal, transcendental perception of the Infinite Father.”