The apparent multiplication of gods is bewildering at the first glance, but you soon discover that they are the same GOD. There is always one uttermost God who defies personification. This makes Hinduism the most tolerant religion in the world, because its one transcendent God includes all possible gods. In fact Hinduism is so elastic and so subtle that the most profound Methodist, and crudest idolater, are equally at home with it.
— George Bernard Shaw
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.
— Dara Shikoh (1627-1658 AD) a Sufi and eldest son of Moghul emperor, Shah Jehan.
India ( Bharath ) is the biggest socialist, democratic, republic country in the world now. And the greatest treasure and the backbone of such a democratic existence of India is due to it's great heritage and hindu credentials which go back to thousands of years. Hinduism ( Sanatana Dharma ), due to its multi faceted virtues, is highly practical and suitably tailored for a multi cultural society, only which the human current community can live upon.
Sanatana means eternal, never beginning nor ending. Dharma is from dhri, meaning to hold together, to sustain. Sanatana Dharma eternally holds all together.
Sanatana Dharma means the Eternal Religion, the Ancient Law. This is based on the Vedas. This is the oldest of living religions. Hinduism is known by the name Sanatana Dharma. What the Vedas alone declare to be the means of attaining the summum bonum or the final emancipation is the Sanatana Dharma or Hindu Dharma.
Through the practice of cosmic love one feels that all bodies are his, all hands are his, all feet are his and that the whole world is his home (Vasudhaiva Kutumbakam). Gradually he becomes one with the soul of the universe and one with the Oversoul also. Hindu ethics leads eventually to Self-realisation.