Lord Kṛṣṇa began to speak to His father according to these principles of the Karma-mīmāṁsā philosophy. "My dear Father," He said, “I don’t think you need to worship any demigod for the successful performance of your agricultural activities. Every living being is born according to his past karma and leaves this life simply taking the result of his present karma. Everyone is born in different types or species of life according to his past activities, and he gets his next birth according to the activities of this life. Different grades of material happiness and distress, comforts and disadvantages of life, are different results of different kinds of activities, from either the past or present life.”
Mahārāja Nanda and other elder members argued that without satisfying the predominating god one cannot derive any good result simply by material activities. This is actually the fact. For example, it is sometimes found that in spite of first-class medical help and treatment by a first-class physician, a diseased person dies. It is concluded, therefore, that first-class medical treatment or the attempts of a first-class physician are not in themselves the cause for curing a patient; there must be the hand of the Supreme Personality of Godhead. Similarly, a father's and mother's taking care of their children is not the cause of the children's comfort. Sometimes it is found that in spite of all care by the parents, the children go bad or succumb to death.