If you come here, you'll see, when kirtana goes on, even small children, they also take part. It is so nice movement.
And by taking part in this movement, automatically you feel some ecstasy, spiritual ecstasy. Then you begin to dance.
We don't ask you to dance, but the chanter automatically dances.
(Srila Prabhupada, Lecture — August 26, 1973, London)