Vedas Upanishads

Veda Vyasa
The Vedas are the ancient scriptures or revelation (Shruti) of the Hindu teachings. They manifest the Divine Word in human speech. They reflect into human language the language of the Gods, the Divine powers that have created us and which rule over us.There are four Vedas, each consisting of four parts. The primary portion is the mantra or hymn section (samhita). To this are appended ritualistic teachings (brahmana) and theological sections (aranyaka). Finally philosophical sections (upanishads) are included. The hymn sections are the oldest. The others were added at a later date and each explains some aspect of the hymns or follows one line of interpreting them. The Vedas were compiled around the time of Krishna (c. 3500 B.C.), and even at that time were hardly understood. Hence they are very ancient and only in recent times has their spiritual import, like that of the other mystery teachings of the ancient world, begun to be rediscovered or appreciated even in India. Like the Egyptian teachings they are veiled, symbolic and subtle and require a special vision to understand and use properly. The great compiler of the Veda and Puranas was Vyasa Krishna Dwaipayana. He was said to be the twenty-eighth of the Vyasas or compilers of Vedic knowledge. He was somewhat older than the Avatar Krishna and his work continued after the death of Krishna. Perhaps he is symbolic of a whole Vedic school which flourished at that time, as many such Vedic schools were once prominent all over India and in some places beyond.
Upanishad means the inner or mystic teaching. The term Upanishad is derived from upa (near), ni (down) and s(h)ad (to sit), i.e., sitting down near. Groups of pupils sit near the teacher to learn from him the secret doctrine. In the quietude of the forest hermitages the Upanishad thinkers pondered on the problems of deepest concerns and communicated their knowledge to fit pupils near them. Samkara derives the word Upanishad as a substitute from the root sad, 'to loosen.,' 'to reach' or 'to destroy' with Upa and ni as prefixes and kvip as termination. If this determination is accepted, upanishad means brahma-knowledge by which ignorance is loosened or destroyed. The treatises that deal with brahma-knowledge are called the Upanishads and so pass for the Vedanta. The different derivations together make out that the Upanishads give us both spiritual vision and philosophical argument. There is a core of certainty which is essentially incommunicable except by a way of life. It is by a strictly personal effort that one can reach the truth.
The Upanishads more clearly set forth the prime Vedic doctrines like Self-realization, yoga and meditation, karma and reincarnation, which were hidden or kept veiled under the symbols of the older mystery religion. The older Upanishads are usually affixed to a particularly Veda, through a Brahmana or Aranyaka. The more recent ones are not. The Upanishads became prevalent some centuries before the time of Krishna and Buddha.
The main figure in the Upanishads, though not present in many of them, is the sage Yajnavalkya. Most of the great teachings of later Hindu and Buddhist philosophy derive from him. He taught the great doctrine of "neti-neti", the view that truth can be found only through the negation of all thoughts about it. Other important Upanishadic sages are Uddalaka Aruni, Shwetaketu, Shandilya, Aitareya, Pippalada, Sanat Kumara. Many earlier Vedic teachers like Manu, Brihaspati, Ayasya and Narada are also found in the Upanishads. In the Upanishads the spiritual meanings of the Vedic texts are brought out and emphasized in their own right