It is essential for persons who are actually liberated to hear about the pastimes of Kṛṣṇa. That is the supreme relishable subject matter for one in the liberated state. Also, if persons who are trying to be liberated hear such narrations as the Bhagavad-gītā and Śrīmad-Bhāgavatam, then their path of liberation becomes very clear. The Bhagavad-gītā is the preliminary study of Śrīmad-Bhāgavatam. By studying the Gītā, one becomes fully conscious of the position of Lord Kṛṣṇa; and when he is situated at the lotus feet of Kṛṣṇa, he understands the narrations of Kṛṣṇa as described in Śrīmad-Bhāgavatam. Lord Caitanya has therefore advised His followers that their business is to propagate kṛṣṇa-kathā.
Kṛṣṇa-kathā means narrations about Lord Kṛṣṇa. There are two kṛṣṇa-kathās: narrations spoken by Kṛṣṇa and narrations spoken about Kṛṣṇa. The Bhagavad-gītā is the narration or the philosophy on the science of God, spoken by Kṛṣṇa Himself. Śrīmad-Bhāgavatam is the narration about the activities and transcendental pastimes of Kṛṣṇa. Both are kṛṣṇa-kathā. It is the order of Lord Caitanya that kṛṣṇa-kathā should be spread all over the world, because if the conditioned souls, suffering under the pangs of material existence, take to kṛṣṇa-kathā, then their path of liberation will be open and clear. The purpose of presenting this book is primarily to induce people to understand Kṛṣṇa or kṛṣṇa-kathā, because thereby they can become freed from material bondage.