משלי, פרק י׳, פסוק י״א

Human speech is a powerful force, capable of acting as a wellspring of life or a disguise for destruction. The sharp contrast between the speech of a good person and that of an evil one reveals the extreme impact each has on the world around them.

The words of a righteous person are like a flowing spring that brings vitality to the world [שטיינזלץ, מצודת דוד]. The primary approach among commentators is that such speech grants life—both in this world and the next—to anyone who listens, learns moral lessons, and is inspired to serve God. Through words of wisdom, the righteous individual secures spiritual life for himself and for others [רלב"ג, אבן עזרא, עמנואל הרומי, אמרי דעת]. While a wise person might teach rules through organized study, a righteous person teaches the true path of life through daily moral behavior. People draw life simply by observing his actions and listening to his practical guidance in every small detail of their lives [מלבי"ם]. The power of this goodness is so immense that it even extends life to the wicked who speak badly of him [אלשיך].

In complete contrast, the speech of the wicked serves a destructive purpose, often associated with theft and ruin. The primary approach among commentators is that the mouths of the wicked act as instruments of hypocrisy and deceit. They speak smoothly to hide the hatred and violence buried deep within their hearts [רש"י, רלב"ג, מצודת דוד]. However, other viewpoints expand on this destructive nature. Some explain that their speech does not merely hide evil, but actively covers the world with violence by influencing others to do wrong and stirring up conflict [שטיינזלץ, עמנואל הרומי]. Another perspective suggests that the wicked cover up wisdom itself, selfishly keeping their thoughts hidden and refusing to teach moral lessons to others [אבן עזרא]. Finally, a unique approach proposes that the wicked are deeply ungrateful. They use their words to falsely accuse the very righteous people who sustain them, claiming that the moral teachings of the righteous are nothing more than hypocrisy designed to hide the good person's own secret wrongdoings [אלשיך].