Proverbs 16:21-23

New Revised Standard Version, Anglicised

²¹ The wise of heart is called perceptive,
    and pleasant speech increases persuasiveness.
²² Wisdom is a fountain of life to one who has it,
    but folly is the punishment of fools.
²³ The mind of the wise makes their speech judicious,
    and adds persuasiveness to their lips.