A yagya is a means of direct interaction with the positive forces in creation. Vedas abound with descriptions of yagyas performed the rishis and munis to energise the manifested creation. Devs and devis would come to be a part of such yagyas. Asurs and daityas would also come…to disturb them, creation being a balance of the two forces, positive and negative.

Even in the times when Rishi Agastya and Vishvamitra were in the body, there existed negativity, asurs tried to disrupt the yagyas and havans performed by these rishis. Ram and Lakshman went with Rishi Vishvamitra to protect one such yagya. Asurs are known to disrupt havans and create obstruction in invocation of devic forces. That is the nature of an asur. The nature of a human being is to aid the positive forces, the devs and devis, by protecting the havans for the peace and prosperity of one’s home, surroundings and creation at large. If someone is preventing you from doing a havan then that person’s asuric side is predominant - a good way to check someone else’s and your own nature.