“There are many research scholars and philosophers who study sex life or some other subject, but according to Bhagavad-gita, such research work and philosophical speculation have no value. That is more or less nonsensical. According to Bhagavad-gita, one should make research by philosophical discretion into the nature of the soul. One should make research to understand with what the self is concerned.” (Shrila Prabhupada, Bhagavad-gita, 13.8-12 Purport)