In the Puranas, this rupture is made explicit. The devas prefer yagna but not tapasya. The asuras prefer tapasya but not yagna. Both are the children of Brahma. Indra, leader of the devas, who is not committed to the inner journey, is eternally insecure: he fears those who perform yagna and tapasya, and considers them as rivals. So he disrupts the yagna of kings by stealing their horses.
