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.