Lectures and Commentaries on Srimad Bhagavatam Canto 3, made in Vrindavan (India)
The purpose of Śrīmad Bhāgavatam is to glorify the Supreme Absolute Truth, known as Śrī Kṛṣṇa, for the benefit of the suffering humanity. Śrī Vyāsa himself calls this Purāṇa the ripened fruit of the Vedic tree and compares it to the personification of rasa, or devotional relish. It is to be tasted by the rasikas, the connoisseurs of rasa, and relished by the sahṛdayas, the sober-hearted people or those whose hearts are imbued with sattva (SB 1.1.3)
When people want to take revenge, this is something they get very much fixed on – they can wait three generations. When you ask them to fix their mind on Krishna then it is difficult. This is how the human mind works – if you want to fix it on something good, you have to work hard for that. If you want to fix it on destruction, then it is easy.