Preaching program with Partha Sarathi Das Goswami in the Iskcon Temple of Kharkov, Ukraine (Album with photos)
Srila Prabhupada: By chanting the holy name of Krishna one is cleansed of the dirt that accumulates in the mind. One can purify the mind either by the breathing process or by the chanting process, just as one can purify gold by putting it in a fire and fanning it with a bellows. (Srimad-Bhagavatam, 3.28.10 Purport)
Find them here: https://goo.gl/sUyuEJ