Though silence is not necessarily an admission, it is not a denial, either.

When they hold their tongues they cry out. [Lat., Cum tacent clamant.]

Silence is one of the great arts of conversation.

It is foolish to tear one's hair in grief, as though sorrow would be made less by baldness.

Silence is never an admission. We learn that in law school.

His deeds do not agree with his words. [Lat., Facta ejus cum dictis discrepant.]