However all religious ceremonies of Hindus like marriage ceremony, Upanayanam, death rites etc are Vedic ceremonies and the Gods invoked are Vedic Gods.

All the Upanishads say the same thing. They say that there is only one God called Brahmam ( Brahmam is different from Brahma who is one of the Trimurthis). Brahmam is also known by the names Hiranya Garban, Prajapathi, Paramatma, Virat Purusha. He is the Universal Soul who pervades the entire Universe and exists as life in all living beings. The sum total of all tangible things in the Universe is Virat Purusha and the sum total of all intangible things in the Universe is Hiranya Garban. This Universal Soul created the entire Universe. He has no form and no qualities. While describing Brahmam in the Brihadaranyaka Upanishad , Yajnavalkya describes what He is not instead of saying what He is. The Kata Upanishad says, "If you can say 'this is Brahmam',then it is not Brahmam". Because Brahmam is beyond description and beyond the comprehension of the human mind. He is represented by the letter "Om" which is known as Akshara Brahmam. The letter Om means Truth. Om has a special significance for all Hindus because it represents the Paramatma the same way the Cross represents what Jesus Christ stood for in Christianity. The Pramatma is the only God and all other Gods are manifestations of the Paramatma. The aim of all human beings should be to achieve communion with the Paramatma. The Paramatma is inside every human being in the form of Jeevatma or individual soul. This Paramatma inside can be found by meditation only. The Upanishads say that the only way to attain communion with the Paramatma is by meditation. At the time of meditation one chants 'Om'.

The Kata Upanishad says, "It is not possible to realize Brahmam just by deep knowledge or extensive reasoning. A person who meditates ceaselessly about Brahmam alone will be able to realize Him. The Brahmam then shows him His true nature". Also "A person who does not give up evil ways, who does not have control over senses and who does not put his mind to peace by meditation can not attain this Supreme Being by knowledge alone".

When the Jeevatma does not attain communion with the Universal Soul, after death the person is reborn as a human being or an animal or insect and goes through the difficulties of life. The underlying principle of this statement is that life is a sea of difficulties and sorrows with occasional islands of joy or happiness. The cycle of rebirths the Jeevatma goes through is called transmigration of the soul because the soul migrates from one body to another body. When the communion is achieved , the Jeevatma goes to Brahmalokam and joins permanently with the Paramatma, the Supreme Being and the chain of rebirths stops. This is called Moksham or Mukthi. Every facet of Hinduism is pervaded by the concept of Moksham. Bhagawan Ramana Maharshi of Tiruvannamalai has given a slightly different interpretation to Moksham. He says that finding the Paramatma in the depths of one's mind is itself Moksham without bothering about the concept of rebirth. A person who meditates on the Supreme Being is called a Yogi because meditation is called Adhyatma Yogam. A person who has achieved communion with the Supreme Being is called Gnani because he has found the Truth (Gnanam means knowledge). Such a person finds the true nature of Brahmam or the Supreme Being in the depths of his mind. Such a person becomes free from desires, joys and sorrows, becomes self-controlled and serene. The Brihadaranyaka Upanishad says that a person who is completely free from all desires himself becomes Brahmam. In modern times well-known