Dhruva Maharaja was a liberated soul, and actually he was not angry with anyone. But because he was the ruler, it was his duty to become angry for some time in order to keep law and order in the state. His brother, Uttama, was without fault, yet he was killed by one of the Yaksas. It was the duty of Dhruva Maharaja to kill the offender (life for life) because Dhruva was the king. When the challenge came, Dhruva Maharaja fought vehemently and punished the Yaksas sufficiently. But anger is such that if one increases it, it increases unlimitedly. In order that Dhruva Maharajas kingly anger not exceed the limit, Manu was kind enough to check his grandson. Dhruva Maharaja could understand the purpose of his grandfather, and he immediately stopped the fighting. The words srutena bhuyasa, by constantly hearing, are very important in this verse. By constantly hearing about devotional service, one can check the force of anger, which is detrimental to the process of devotional service. Srila Pariksit Maharaja said that the constant hearing of the pastimes of the Lord is the panacea for all material diseases. Everyone, therefore, should hear about the Supreme Personality of Godhead constantly. By hearing one can always remain in equilibrium, and thus his progress in spiritual life will not be hampered.