What does a quiet mind mean?

Q: Does a quiet mind mean focusing attention one-pointedly on a particular subject? As for instance, while aspiring one should not allow any other thoughts than of the Divine in the quiet mind.

A quiet mind is a mind that does not get disturbed, is not restless and always vibrating with the need of mental action.

What you are talking about is a concentrated mind, concentrated on something or on a subject. That is quite different.

-Sri Aurobindo