Those engaged in broadcasting the holy name of Narayana, Krsna, through the Krsna consciousness movement should always consider what our position was before we came and what it is now. We had fallen into abominable lives as meat-eaters, drunkards and woman hunters who performed all kinds of sinful activities, but now we have been given the opportunity to chant the Hare Krsna mantra. Therefore we should always appreciate this opportunity. By the grace of the Lord we are opening many branches, and we should use this good fortune to chant the holy name of the Lord and serve the Supreme Personality of Godhead directly. We must be conscious of the difference between our present and past conditions and should always be very careful not to fall from the most exalted life.
(Srila Prabhupada's purport to SB 6.2.34)