One should not angrily, take up the rod of punishment for laying it upon another. Only the son or the pupil, it has been said, can be mildly reprimanded for purposes of instruction.
परस्य दण्डं नोद्यच्छेत् क्रद्धो नैनं निपातयेत्। अन्यत्र पुत्राच्छिष्याच्च शिक्षार्थं ताडनं स्मृतम्॥