According to Hindu mythology Devtas (Gods) and Asuras (Demons) once decided to churn out the ocean of milk to solve the issue of supremacy among them. The churning stick was Mandra mountain on the back of Kurma ( an epical tortoise).The rope needed to churn was the Vashuki ( multiple headed king of snakes of Lord Vishnu). Lord Vishnu sat on the the pivot such that it will not skid in the ocean. All the Gods were on one side and all the Asuras were on the other side. As the churning of the ocean reached the peak, from the froth a deadly scum started forming. All gods and Devils got frightened after seeing it. It was Vish (Poison). Either someone had to swallow it or everyone was going to be in trouble. Seeing the unwillingness of everyone, Lord Shiva came to rescue and he took the Vish in mouth but did not swallowed it and kept it in the throat static. Hence his throat turned out blue due to effect of poison. Since then he is also known as NeelKanth ( Having blue throat) .

After this event the churning started again to result the chaturdash ratnas (fourteen precious ratnas /precious things). These ratnas produced from the Samudra Manthan are as follows

1. ‘Chandra’ ( Moon)
2. ‘Parijat’ , a tree in the Paradise of Lord Indra
3. ‘Airavat’ , a multi-tusked elephant for again Lord indra
4. ‘Kamadhenu’ , a cow which provides desired objects
5. ‘Uchchaihsravas’ the white horse for Lord Indra
6. ‘Sankha’ the conch of Lord Vishnu used for victory
7. ‘Gada’
8. ‘Laxmi’ , goddess of wealth
9. ‘Rambha’ , the apsara (celestial beauty) for heaven
10. ‘Ratnas’, ( gems and jewel )
11. ‘Kalpavriksha , a tree fulfilling one’s wishes
12. ‘Dhanwantari’, the physician for all Gods.
13. ‘Mada , a goddess
14. ‘Amrit’ (the nectar drinking which one becomes immortal) in a golden chalice ( Kumbha).

Yantra literally means "Loom, "Instrument or Machine". In actual practice, a Yantra is a symbolic representation of aspects of divinity, usually the Mother Goddess. Yantra is a diagrammatic representation of Mantras. It is an interlocking matrix of geometric figures, circles, triangles and floral patterns that form fractal patterns of elegance and beauty. Although the Yantra is primarily a meditation tool both for serious spiritual seekers as well as sculptors in the classical tradition, its Shakti is also available to new seekers.

Rudra Centre's Yantras are sanctified and energized through an elaborate ritual by specialized priests at a temple in Maharashtra, India. The Pranapratistha ritual is performed to infuse the Yantras with "life force" or energies of respective deities. Rudra Centre's energized Yantras can be placed in the temple, above a door or kept at the place of work where, if worshipped with sincere devotion, rewards will unfold. It is important for a Yantra to be energized as it has to be brought "to live" through the specifically prescribed ritual so that it can radiate its beneficence optimally. An un-energized Yantra can be compared to a very complex music system that has been plugged in but not tuned or turned on and the aspirant has no idea which button will activate it

Since time immemorial, it is believed that mystical Yantras reveal inner basis of forms and shapes abounding in the universe. Yantras function as revelatory symbols of cosmic truths.

How soon can one expect to experience the benefits of wearing or installing a Yantra?. Yantras usually takes 45 days but this is a conservative estimate. Some Yantras activate results almost immediately if one's karmic potential is ripe. Others work better over the long term, gradually but steadfastly increasing stages of blessings. Yantras for prosperity and wealth are usually of this category. Hence patience is required. For example, the Lord Kuber Yantra may or may not bestow immediate results but the patient person will eventually see benefits.

For those who prefer simple worship of a Yantra, traditionally a small lighted oil-lamp or ghee lamp placed in front of the Yantra is regarded as the best form of simple worship. The lighting of incense of various types is also well regarded as is the auditory stimuli of chanting Mantras or playing tapes of sacred chants. As Yantras are living energy systems, they respond to all sensory stimuli. Perfume is perceived as a vain affectation and is to be avoided especially as most perfumes consist of synthetic components.