He who listens to a life-giving rebuke will be at home among the wise. He who ignores discipline despises himself, but whoever heeds correction gains understanding. A rebuke impresses a man of discernment more than a hundred lashes a fool. As iron sharpens iron, so one man sharpens another. A rebuke is a sharper reprimand that implies we're wrong or off track, and need to change course immediately.
Proverbs clearly shows the link between rebuke and spiritual growth.
No one grows where truth is absent. No one is pushed to be and to do the best . . . One solid rebuke is worth a hundred affirmations. Rebukes are the purifiers which keep spiritual passion clear and forceful . . . Rebukes were and still are among my greatest learning moments.