India's soul-offering1
India’s soul-offering is the perennial light of the Upanishads. The Upanishads offer to the world at large the Supreme achievement of the awakened and illumined Hindu life.The Vedas represent the cow. The Upanishads represent milk. We need the cow to give us milk, and we need milk to nourish us.
The Upanishads are also called the Vedanta. The literary meaning of Vedanta is “the end of the Vedas.” But the spiritual meaning of Vedanta is “the cream of the Vedas, the pick of the inner lore, the aim, the goal of the inner life." The Muktikopanishad tells us something quite significant:
Tileshu tailavat vede vedantah supratishthithah.
According to our Indian tradition, there were once one thousand one hundred and eighty Upanishads. Each came from one branch, shakha, of the Vedas. Out of these, two hundred Upanishads made their proper appearance, and out of these two hundred, one hundred and eight Upanishads are now traceable. If a seeker wants to get some glimpse of Truth, Light, Peace, and Bliss, then he must assiduously study these one hundred and eight Upanishads. If a real seeker, a genuine seeker, wants to get abundant light from the Upanishads, then he has to study thirteen principal Upanishads. If he studies the principal Upanishads, and at the same time wants to live the Truth that these Upanishads embody, then he will be able to see the face of Divinity and the heart of Reality.
The thirteen principal Upanishads are: Isha, Katha, Kena, Prasna, Mundaka, Mandukya, Chandogya, Brhadaranyaka, Taittiriya, Aitareya, Svetasvatara, Kaivalya, and Maitri.
  That moves, and That moves not. That is far, and the same is near. That is within all this; That is also without all this."
Again, the Isha Upanishad reconciles work and knowledge, the One and the Many, the impersonal God and the personal God, in a striking manner. Work done detached is real knowledge. When we consciously try to see God in everything and in everybody, we soulfully offer ourselves to dedicated action. This knowledge is action. The One and the Many: we need the One for our self-realisation; we need the Many for our self-manifestation. The impersonal and the personal God: when we live in the impersonal God we see Truth in its illumining Vision; and when we live in the personal God we see Truth in its revealing Reality.
The Son of God declared, “I and my Father are one.” The Chandogya Upanishad makes a bold statement, to some extent more daring, and at the same time more convincing:
  That thou art."
A God-lover knocked at God’s Heart-door. God from within, said, “Who is it?”
The God-lover said, “It is I.” The door remained locked. The man knocked and knocked. Finally he went away.
After an hour he came back again. He knocked at God’s Heart-door. God, from within, said, “Who is it?”
The God-lover said, “It is I.” The door remained locked. The man knocked and knocked at the door in vain. Finally he left.
After another hour, again he came back and knocked at God’s Heart-door. From within, God said, “Who is it?”
The God-lover said, “My eternal Beloved, it is Thou.” God immediately opened His Heart-door.
When a seeker feels this kind of intimate and inseparable oneness with God, God opens His Heart-door to him and offers him His very Throne.
The Upanishadic Seers felt no necessity to go to any spiritual centre, no necessity to go to a temple, no necessity to hear a talk or a sermon or even to study books. God was their only outer book, and God was their only inner teacher. God-realisation was their only necessity, and God-manifestation was their only reality.
The great German philosopher, Schopenhauer, voiced forth, “In the whole world there is no study so beneficial and so elevating as that of the Upanishads. It has been the solace of my life; it will be the solace of my death. They are the products of the highest wisdom. They are destined sooner or later to become the faith of the people.”
The Upanishads offer us three lessons. The first lesson is Brahman. The second lesson is atman. The third lesson is jagat. Brahman is God, atman is the soul, and jagat is the world. When we meditate on Brahman, our life grows into immortalising Bliss. When we meditate on the soul, our life becomes a conscious and speedy evolution. When we do not neglect the world, our life becomes fulfilling manifestation.
If you study the Upanishads, not in a cursory or perfunctory manner, but with the mind’s clarity, then you will see that God and you, you and God, are eternal. And if you study the Upanishads with your heart’s receptivity, you will see that God and you are equal. And finally, if you study the Upanishads with your soul’s light, you will come to realise that there in Heaven you are the realised and esoteric God, and here on earth you are the manifested and exoteric God.
  This soul cannot be won by the weakling."
The Upanishads are the obverse of the coin of which the reverse is consciousness. There are three states of ordinary consciousness: jagriti, swapna, and sushupti. Jagriti is the waking state, swapna is the dreaming state, sushupti is the state of deep sleep. There is another state of consciousness which is called turiya, the pure consciousness of the Transcendental Beyond.
The Mandukkyopanishad offers us a most significant gift. It tells us about the Universal Soul. The Universal Soul has two aspects: vaisvanara and virat. The microcosmic aspect is called vaisvanara; the macrocosmic aspect is called virat. Jagriti, the waking state; vaisvanara, the physical condition; and the letter ‘A’ from AUM, the sound symbol of prakriti, the primal energy, form the first part of Reality. Swapna, the dreaming state; taijasa, the brilliant intellectual impressions; and ‘U’ from AUM form the second part of Reality. Sushupti, the state of deep sleep; prajna, the intuitive knowledge; and ‘M’ from AUM form the third part of Reality.
But turiya, the fourth state of consciousness, at once embodies and transcends these three states of consciousness. On the one hand, it is one part of the four parts; on the other hand, it is the culminating whole, the end, the Goal itself. Turiya is the Reality eternal, beyond all phenomena. Turiya is the Transcendental Brahman. Turiya is satchidananda — Existence, Consciousness, and Delight. It is here, in turiya, that a highly advanced seeker in the spiritual life or a spiritual Master can actually hear the soundless sound, AUM, the supreme secret of the Creator.
The supreme wealth of the Upanishads is the Self:
  Whence the words, the power of speech, come back with the mind baffled, the goal unattained."
This Transcendental Self is covered here in the world of relativity by five distinct sheaths: annamaya kosha, the gross physical sheath; pranamaya kosha, the sheath of the vital force; manomaya kosha, the mental sheath; vijnanamaya kosha, the sheath of the advanced and developed knowledge; and anandamaya kosha, the sheath of Bliss. There are three types of bodies corresponding to these five sheaths. These bodies are called sthula sharira, sukshma sharira, and karana sharira. Sthula means gross physical, and sharira means body. Sukshma means subtle, and karana means causal. The physical body, sthula sharira, comprises annamaya kosha, the material substance. Sukshma sharira, the subtle body, comprises pranamaya kosha, manomaya kosha, and vijnanamaya kosha. Karana sharira, the causal body, comprises anandamaya kosha, the sheath of Bliss.
UPA 1. Princeton University, Princeton, NJ, 22 October 1971↩