What is the highest yoga?

Question

I think this is the most fundamental of questions, and its answer is of great importance.

Answer 1

Parsu's answer is correct. I'd like to humbly add to his answer and provide further information. Because the yoga process is meant to ultimately revive the dormant relationship of the conditioned soul with the Supreme Lord, Sri Krishna, there is no more important question than this one.
Firstly, the fact that a fundamental question like this received only 4 answers after a considerable period of time illustrates another point made by Sri Krishna in the Bhagavad Gita.

manusyanam sahasresu kascid yatati siddaye
yatatam api siddhanam kascin mam vetti tattvatah (Gita 7.3)
"Of many thousands among men, one may endeavor for perfection, and of those who have achieved perfection, hardly one knows me in truth."
The Supreme Personality of Godhead, Sri Krishna, is already the owner and proprietor of everything, as He states Himself in the Bhagavad Gita.

Bhoktaram yajna tapasam sarva loka mahesvaram
suhrdam sarva bhutanam jnatva mam santim rcchati(Gita 5.29)
“The sages, knowing me as the ultimate purpose of all sacrifices and austerities, the Supreme Lord of all planets and demigods and the benefactor and well wisher of all living entities, attains peace from the pangs of material miseries.”

Factually, since the Lord is the origin and proprietor of everything, He is completely unattached to any of our material facilities, wealth, education or other opulence. He already owns everything, and exists on the spiritual platform where he enjoys opulence infinitely more wonderful than anything on the mundane plane.
The Lord is only seeking one thing from us, that which is in our hearts, and to offer the heart and soul in divine love is called bhakti yoga – culminating in prema, or pure love of God. As Parsu has quoted from the Bhagavad Gita (6.47), this is the highest state of yogic communion with the Supreme, and the perfection and flowering of the relationship of the individual soul with Krishna.

Bhakti yoga is also the only means by which one can comprehend something of the transcendental nature of Krishna and achieve the state of self realization – no amount of bodily gymnastics (hatha) or mental speculation to understand the absolute truth (jnana) can lead one to spiritual perfection.

Bhakta mam abhijanat yavan yas casmi tattvatah
Tato mam tattvato jnatva visate tad anantaram (Gita 18.55)
“One can understand the Supreme Personality as He is only by devotional service (bhakti), And when one is in full consciousness of the Supreme Lord by such devotion, he can enter into the kingdom of God”
Additionally, the only means of liberation from the entanglement of this material existence is to become conscious of one’s original eternal relationship with the Lord.

Mac citta sarva durgani mat prasadat tarisyasi
Atha cet tvam ahankaran na srosyasi vinanksyasi (Gita 18.58)
“If you become conscious of Me, you will pass over all the obstacles of conditional life by My grace. If however, you do not work in such consciousness but act through false ego, not hearing Me, you will be lost.”

Srila AC Bhaktivedanta Swami, founder and spritual master of the International Society for Krishna consciousness, describes in the purport to the verse quoted by Parsu.

“….The culmination of all kinds of yoga practices lies in bhakti yoga. All other yogas are but means to come to the point of bhakti in bhakti yoga.Yoga actually means bhakti yoga; all other yogas are progressions toward the destination of bhakti yoga.” (Gita 6.47 purport)

Answer 2

There are some answers but no will give form Authority…

Bhagavad Gita is the Authority of Vedic Literatures and highest book on Yoga.

In Bhagavad Gita, God Says
“And of all yogis, the one with great faith who always abides in Me, thinks of Me within himself, and renders transcendental loving service to Me—he is the most intimately united with Me in yoga and is the highest of all. That is My opinion.” (BG 6.47)

You can read it online at http://www.bhagavadgitaasitis.com/en
It’s a great book ..

Answer 3

Kriya Yoga. The practise of each Kriya allows the human soul to forgo a lifetime (apparently, each soul must undergo a million lifetimes before it can reach enlightenment). The dedicated practise of Kriya Yoga has the potential to allow the human soul to reach enlightenment in one lifetime.

Answer 4

When it is done in a plane at 33,000 feet?
I think so.

Answer 5

the highest level of tantra