can you please answer my hindu question about Upanishads?

Question

Explain the central philosophical concepts of the Upanishads and how they function and interrelate. How does the concept of religion that emerges in the Upanishad represent a threat and a challenge not only to earlier and later religious developments in India but to any kind of theism (belief in a transcendent God distinct from the self and the world)?


You don't have to answer it but if you can please just point me in the right direction I would truly appreciate it

Upanishads
The intrinsic attraction of the Upanishads is found both in their teachings and their purpose. Prevalent before the time of Krishna and Buddha, the Upanishads were written between 800 and 600 B.C. they are perhaps one of, if not, the earliest examples of mans quest for knowledge in a civilization with a recorded mythos. They are some of the first questions posed of our universe. Fundamental questions as to who we are and where do we come form.

Answer 1

The word "Upanishad" consists of three words—"Upa" means "near", "ni" means "down" and "shad" means "be seated".
So, "Upanishad" means, "be seated at the feet of the Guru to receive the teaching."
http://sanatan.intnet.mu/

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.
http://www.hindunet.org/upanishads/
Upanishads - The Texts
http://sanatan.intnet.mu/upanishads/upanishads.htm
I hope some of these links will help you in your quest for klnowledge.

Answer 2

About Upanishads

Answer 3

Im hindu and all. but i have NEVVAAA heard of the Upanishads. and im pretty well informed about my religion.