Another impediment is prajalpa, unnecessary talking. When we mix with a few friends, we immediately begin unnecessary talking, sounding just like croaking toads. If we must talk, we should talk about the Krsna consciousness movement. Those outside of the Krsna consciousness movement are interested in reading heaps of newspapers, magazines and novels, solving crossword puzzles and doing many other nonsensical things. In this fashion people simply waste their valuable time and energy. In the Western countries old men, retired from active life, play cards, fish, watch television and debate about useless socio-political schemes. All these and other frivolous activities are included in the prajalpa category. Intelligent persons interested in Krsna consciousness should never take part in such activities.

(From Srila Prabhupada's purport to Nectar of Instruction, verse 2)