As soon as we have got some time, chant Hare Krsna. Either loudly or silent… As far as possible loudly; if not possible, silently. But the tongue must go: Hare Krsna, Hare Krsna, Krsna Krsna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. The tongue must work. And as far as possible, should be heard… That is… And officially, krshkshaharamahaharama… [chants very fast, with words running into each other indistinctly] Not like that. [chants again like that] Not like that. That will not… Every word should be distinctly chanted and heard, not official.

Srila Prabhupada — July 16, 1973, London