They make a lot of sense, these wise folks; whenever they speak, their reputation increases.
The heart of the wise teacheth his mouth, And addeth learning to his lips.
The mind of the wise instructs his mouth, and adds learning and persuasiveness to his lips.
The heart of the wise instructeth his mouth, And addeth learning to his lips.
The mind of the wise makes their speech insightful and enhances the teaching of their lips.
The heart of the wise shall instruct his mouth and add grace to his lips.
The heart of the wise shall instruct his mouth: and shall add grace to his lips.