The division created by the English educated scholars who separate the Vedas and the Upanishads from the Puranas and thus make a distinction between the Vedic dharma and the Puranic dharma is a mistake born of ignorance . The Puranas are accepted as an authority on the Hindu dharma because they explain the knowledge contained in the Veda and the Upanishads to the average man, comment upon it, discuss it at great length and endeavour to apply it to the commonplace details of life .
The Bhagavad-Gita professes to give nothing new beyond what has previously been taught by the Upanishads . It contents itself with a synthesis of the older teachings.
If the Upanishads are the textbooks of philosophical principles discussing man, world and God, the Geeta is a handbook of instructions as to how every human being can come to live the subtle philosophical principles of Vedanta in the actual work-a-day world.
The Geeta is a bouquet composed of the beautiful flowers of spiritual truths collected from the Upanishads .
Our belief in moksha is very ancient existing years before the christian era...Moksha is a pre-Aryna concept found in Sramana culture and later got assimilated in the Upanishads .
The composers of the Puranas are either accomplished yogis or seekers of Truth. The Knowledge and spiritual realisations obtained by their sadhana remain recorded in the respective Puranas. The Vedas and the Upanishads are the fundamental scriptures of the Hindu religion, the Puranas are commentaries on these scriptures.
The songs of Thyagaraja reflect the spiritual climate of the Vedas and the Upanishads and also implied teachings of the epics and the puranas.
Shanti – peace - is a most essential quality expressed in the ancient Vedic texts of the Upanishads. It is invoked at the beginning and the end of each Upanishad chapter.
There is group of special shanti mantras found in vedic texts, such as the Upanishads. At he close of each Upanishad chapter, for instance, the word shanti is chanted three times, as a mantra. This is to remove the three kinds of suffering – personal, external and atmospheric
...if we study the Gospel of Sri Ramakrishna, we find that though He taught the truths contained in the Upanishads, He illustrated these principles to us by methods that are Tantric in origin and content. His worship of and devotion to Mother Kali, Sri Krishna, Mother Sita, Lord Chaitanya, Lord Shiva, and others, reveal His wonderful Tantric nature and point to the many ways of practicing the Vedic truths.
The Purânas, the Tantras, and all the other books, even the Vyasa-Sutras, are of secondary, tertiary authority, but primary are the Vedas. Manu , and the Puranas, and all the other books are to be taken so far as they agree with the authority of the Upanishads, and when they disagree they are to be rejected without mercy.
Pure Vedantic Hinduism as described in particular in the Upanishads is monist and either pandeist or panendeist - Brahman is the Universe, we (as Atman or "God-souls") are a part of Brahman and Brahman itself, parts separated from the whole to be able to appreciate the whole and ever seeking to rejoin the whole and its perfect state of being as all things. Brahman in the Upanishads is not a being that is worshipped - they make it absolutely clear that Brahman is indifferent to worship and is not the object of worship.
I go into the Upanishads to ask questions.
After gradual research; I have come to the conclusion that long before all heavenly books, God had revealed to the Hindus, through the Rishis of yore, of whom Brahma was the Chief, His four books of knowledge, the Rig Veda, the Yajur Veda, the Sama Veda and the Atharva Veda. The Quran itself made veiled references to the Upanishads as the first heavenly book and the fountainhead of the ocean of monotheism.
This Ganga was sent out for salvation of the world of Sambhu, Lord of lords, filled with the sweet wine of compassion. Shankara, having squeezed out the essence of yoga and the Upanishads , created this excellent river because of his mercy for all creatures.