In plain words
What the bond between them and Me is like, I will tell you; listen," He said. "One body has many limbs. Within My body Dharmaja is like the head. The two arms too: Arjuna is like them. My belly is Bhīma. My two feet are Nakula and Sahadeva." Within such a body Kṛṣṇa is there as the Heart. "So, whatever the bond is between the body and the heart, that is the bond between Me and the Pāṇḍavas," He said.
The moment they heard these words, the muscles of Duryodhana and Duśśāsana melted. As long as one has strength of muscle, there is fat in one. There is arrogance. So for the wicked Kauravas such qualities are only natural. With this, in very many ways, Duryodhana and Duśśāsana came into the middle of the court. But Dhṛtarāṣṭra wished for some rest. What does that mean? Was it that he did not like to talk in front of these sons? His wish was to call Kṛṣṇa to him alone and talk with Him. Dhṛtarāṣṭra went into a room and sat down. Taking that moment, Kṛṣṇa too came in. Holding both Kṛṣṇa's hands, this blind Dhṛtarāṣṭra pleads: "Kṛṣṇa, my sons are wicked and evil; I know it. This blind love for my sons is sinking me into such ignorance. The Pāṇḍavas are truly Dharma embodied. Their justice, their Satya, their conduct are ideal. But I, somehow, cannot stand against this," he said. Kṛṣṇa spoke to him sternly: "Dhṛtarāṣṭra! To have love for one's sons is good. But love for one's sons beyond all bounds makes one lose one's way. Do we not clean away the filth that comes out of our own bodies?" Then Dhṛtarāṣṭra said: "Swami, those things are inert. My sons are living beings. How am I to bring myself to hatred of the sons born of my own body?" "Wickedness must be given up without any attachment or sense of mine," Kṛṣṇa said. "Son or husband, mother or father, whoever it may be, when they take to the evil path it is most needful to give them up," He said. "As far as possible, one must first strive to set them on the path by teaching them. When it has gone beyond that, to give them up is Dharma," He said.
After this talk had taken place, Kṛṣṇa made up His mind that the embassy could no longer succeed at all. He did not go back into the court. He mounted the chariot. He turned and came back. And here, how the Pāṇḍavas were suffering! "We have sent Kṛṣṇa, God Himself, as our envoy to these Kauravas; what will these wicked men do to Kṛṣṇa Paramātma, how will they insult Him, what troubles will they put Him through?" So they left off eating and were fretting deeply. The moment they saw Kṛṣṇa's chariot, they came, asking, "Where is Kṛṣṇa?" The wicked cast away the thought that He is God and are ready for every kind of evil deed. The moment they saw Kṛṣṇa's smiling face, the Pāṇḍavas were filled with joy. No one asked what had become of the embassy.