There are traditional systems of purification in Vedic  culture,  and these are progressed and changed according to time place and circumstances , currently in the age of Kali  , an age of quarrel and hypocrisy , the Goswamis of Sri Caitanya Mahāprabhu have introduced a system of  purification for men of the lowest qualities.

Such men can be made into Brahminical priests who can even conduct fire sacrifices .

The process of first initiation into the chanting of the Holy names of Krishna is followed after a time period by Gayatri mantra , which enables one to perform priestly services.

The Gayatri mantra ,is series of sacred chants that enable the person to realise that the real seer is the consciousness not the eye , of the fleshy body ,and the real experience of being is not because of a mind and intelligence,  but because of the soul within and trapped in thd bodh , the Gayatri mantra supposedly is directed at the sun , but the sun is synonymous with the light of consciousness.

Thus, the consciousness goes through a series of steps so that proper vision of the existence of Divinity is seen and felt everywhere and in all beings .