The insistence gives the ego away. True Silence is indeed the State in which God is remembered. Revelation is beyond all words. Yet though this deep Silence is always available, it is very fearful to a conflicted mind that believes in separation. Chatter, thoughts of the past and future, are the ego's attempt to deny Divine Silence from awareness.
Words are only symbols of thoughts.
A mind in accord with Spirit is Silent and can be spoken through. Whether the body seems to be speaking or not speaking, moving or not moving, is irrelevant to such a miraculous Silence. Silence is natural, though it can be obscured from awareness by the choice to align with the ego. The issue is never to speak or not to speak, but to be clear of your purpose. This is the decision to be made.