एकम् सत् विप्राः बहुधा वदन्ति
Transliteration: Ekam Sat Viprāha Bahudhā Vadanti
English: "Truth is One, though the Sages know it by many names.
— Rig Veda

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.
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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.

Hinduism stands unrivalled in the depth and grandeur of its philosophy. Its ethical teachings are lofty, unique and sublime. It is highly flexible and adapted to every human need. It is a perfect religion by itself. It is not in need of anything from any other religion. No other religion has produced so many great saints, great patriots, great warriors and great Pativratas. The more you know of it, the more you will honour and love it. The more you study it, the more it will enlighten you and satisfy your heart.

A philanthropist donates big sums to social institutions. He regards this as some kind of social service only. That is all. He has not got the Bhava or mental attitude, that the whole world is a manifestation of the Lord and that he is serving the Lord. He has not got the Bhava that the Lord is working through his instruments or senses, that every act is an offering unto the Lord, and that every deed is a Yogic activity.

In India, dinner is prepared for five hundred persons even when two hundred persons are invited. Feeding is worship of Narayana or the Lord, for a Hindu. It is Atithi-Yajna or sacred sacrifice. A Hindu regards every creature as the Lord.

The Hindus are very generous, noble, large-hearted, charitable, God-fearing, sympathetic, merciful and hospitable. If they see a hungry man in the street, they will take him to their house, treat him as Atithi-Narayana (God in the form of guest), feed him first and then take their food. Nowhere in the world you will hear of such a treatment. You cannot get even a morsel of food free in other countries. A Hindu believes that if he feeds a single sage or a Mahatma, he is feeding the whole world, because he has realised that a realised sage is identical with the whole Virat or Brahman and is one with all beings of the entire universe. Hindu ethics is based on the sublime philosophy of Vedanta which propounds the doctrine of oneness of life and unity of consciousness. Ethics or morality and doing good to others, is the manifestation of this oneness. A Hindu distributes food to the crows, dogs, cows and fish first before he takes his food. He tries to recognise the one Atman that is hidden in all these forms. He endeavours to become one with the Universal Being. He knows that in loving others he loves himself and in injuring others he injures himself. Through the practice of cosmic love he 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. Ethics is a means to Yoga.