Circles
Bhagavad-gita As It Is
BG Chapters 13 - 18
BG 17.15, Purport:
The process of speaking in spiritual circles is to say something upheld by the scriptures. One should at once quote from scriptural authority to back up what he is saying. At the same time, such talk should be very pleasurable to the ear. By such discussions, one may derive the highest benefit and elevate human society. There is a limitless stock of Vedic literature, and one should study this. This is called penance of speech.