SriAdishankara’s advice

ko’ andho? ( who is blind?)
Yo akaarya- ratah ( he who delights in knowingly doing what should not be done)

ko badhiro? ( who is deaf?)
yo hitaani na srunoti ( he who does not listen to advice given for his good)

ko muko?  ( who is stupid?))
yah kaale priyaani vaktum na jannani ( he who does not know to speak sweetly when needed)