Do's and Dont's for the Tongue

If by the tongue you chant Hare Krsna mantra, and by the tongue you taste prasadam, you will be perfect, simply by executing these two things. Do not accept anything, do not allow the tongue to touch anything which is not offered to Krsna. This is one item. And another item -- engage the tongue, always chanting Hare Krsna. You become perfect.

>>> Ref. VedaBase => Bhagavad-gita 1.10 -- London, July 12, 1973