A yagya performed under the sanidhya of a Guru, with purity in thoughts, ingredients and the correct chants, has the effect of completely changing the environment — the weather changes, air becomes fragrant, birds perch on the trees around, there is peace and stillness within and outside and diseases disappear - these are all indicators of warding off negativity and manifestation of positive forces in creation. Sadhaks at Dhyan Foundation routinely conduct such yagyas for purity of homes, environment and body, the manifestations are witnessed and recorded and their effects felt by one and all