 He was involved in the salt satyagraha of the 1930s, led by Gandhi, and spent six months in prison for this.While in prison, Rao he wrote an exposition on the Bhagavad-Gita, a sacred text of India.He argued in this that the Bhagavad-Gita did not belong to a particular religion but rather to the entire humanity as a scripture of yoga for the spiritual enlightenment and prosperity of the entire world.