Tamāla Kṛṣṇa: "Akarma means without reaction to work. The impersonalist ceases fruitive activities out of fear so that the resultant action may not be a stumbling block on the path of self-realization whereas the personalist knows rightly his position as the eternal servitor of the Supreme Personality of Godhead. Therefore he engages himself in the activities of Kṛṣṇa consciousness because everything is done for Kṛṣṇa he enjoys only transcendental happiness in the discharge of his service. Those who are engaged in this process or without desire for personal sense gratification, the sense of eternal servitorship to Kṛṣṇa makes one immune to all reactionary elements of work."
Prabhupāda: That's all. Now any question? Yes?
Tamāla Kṛṣṇa: Can you explain, Prabhupāda, once again what action in action and inaction in action?
Prabhupāda: Action, just like you are active. You are working, you all Kṛṣṇa conscious devotees, you are also working. You are not sitting idly, but it is inaction. Inaction in this sense that it is not producing any reaction. It has no reaction. But others, those who are not acting in Kṛṣṇa consciousness, they are also busy but they are producing their reaction. So things which are not producing reaction, that is inaction. One who can see that "I am acting in this way, there is no reaction," that is inaction. And one who sees that "I am doing this but there is reaction," that is action. So it requires little intelligence to see how it is action or inaction. Therefore it is said that one who can see action in inaction and inaction in action, he is intelligent.