mouth. Put by Figure of speech Metonymy (of Cause), App-6, for what is spoken by it.
of pride. Genitive of Possession, "pride's sceptre". See App-17 (3). On the one side, we have "pride", prating, and punishment; on the other side, prudence, piety, and preservation.
lips. Put by Figure of speech Metonymy (of Cause), App-6, for what is spoken by them.
preserve. guard.