The angels tongues are pure praise. Fire is also praise, the flickering flames are praise. Voice is praise, hearing is praise. All these images of praise are images of movement: fire moves, wind moves, tongues move, breath moves, hearing moves. In this praise there is a reverse movement toward God, perhaps mirroring. Energy moves out from God through the angels, and this movement back toward God in the form of praise is vibratory, dynamic, and meaningful.
The notion of silence appears to unsettle—or puzzle—no small number of people of all walks of life...Something as "unproductive" as silence is not often taken seriously. The evaluation of silence differs from culture to culture. In the West, if you notice that someone is silent for a prolonged period of time, the tendency might be to ask, "are you all right?" Or the silence might be interpreted as a sign of unbalanced introversion or isolation or passive aggression. In India, they would say of the silent one, Ah muni! (Ah, there is a holy soul!)