In the 15th verse of chapter 2 of Bhagavad Gita for happiness, Lalwani says that duties for human beings are described in the Vedas, and the Vedas are manifested by God himself. Lord Krishna adds that Vedas guide humans to regulate their activities. If any task is not in tandem with the same, it is called sin or vikarma. He also explains about Yagna Purusa.