Lord Kṛṣṇa, here it is said, śrī-bhagavān uvāca: "the Supreme Personality of Godhead said." Bhagavān. It is not written here kṛṣṇa-uvāca, because people might take Kṛṣṇa as ordinary person, historical person. Therefore the author, Vyāsadeva, says bhagavān uvāca. Bhagavān means the Personality of Godhead.
Personality of Godhead…, there is definition who is Personality of Godhead. There are many persons—we are all persons. All living entities, they are individual persons. Just like you are a person, I am a person, the dog is also person, a cow is also person—everyone is individual. But Bhagavān means the Supreme Person. As we are many persons here, sitting together, but there is some difference: they are not equal in their status of life, in their understanding, in their knowledge, in their bodily feature. Every individual person, we are not equal. I am thinking in different way, you are thinking in different way; my ambition is different, your ambition is different; my profession is different, your profession is different.