Proverbs 20:30 The blueness of a wound cleanses away evil: so do stripes the inward parts of the belly. 

In the ancient world, a bruise or wound that turned blue or dark showed that the unhealthy matter had been forced to the surface, allowing the wound to close and heal. This physical reality becomes an analogy for moral correction.

Discipline – symbolised here by “stripes” – purifies the inner life, driving out foolishness, disobedience, and moral evil, especially in children. Loving correction produces moral clarity, strengthening the conscience and shaping good character. When administered wisely and justly, discipline prevents greater harm by addressing destructive tendencies before they have a chance to take root.

This proverb underscores the biblical principle that correction, though painful, is beneficial and restorative.