Birth, marriage and death are the three pillars of human life and existence. Of these, marriage is a social convention. In the Indian context, marriage has a religious and cultural background associated with it. The Hindus of Assam too have, since ancient times, regarded marriage as an essential responsibility. Therefore it has a distinct tradition of its own and a gamut of customs and rites are intertwined with the ceremony of  marriage.

The micro data of different communities of India –its castes and tribes – if put together and viewed in macro frame-work often leads us to the threads of unity. The apparent diversity, the cultural plurality gives way to commonality of cultural elements, our cultural continuum. Our approach brings a lot of difference – the approach whether we want to emphasize the diversity or intend to search the basic materials of culture, the permutation and combination of which make the difference.

Before an attempt is made on the concept of Nyishi custom of worshipping nature through puja or festivals like Nyoyin-Nyokum; it is necessary to focus on the religious belief of the Nishing (Nyishi). The Nyishi, who dwell in nature, believe in numerous Uyus (deities). This belief centres on spirits or deities of nature. All the performances of customary rites of Nyishi more or less relate to natural objects in Siichii and Nyedo i.e. earth and sky.