Without grief and endowed with spirituality, he [Arjuna] completely cut off all dualistic doubts and dissolved them into energy that is unqualified by shapes and manifestations.
Confusion and grief arises due to dvaita, duality. In the final issue, duality means to consider the self different from Godhead. We are not identical to God, but God is identical to us. It may not be feasible to suitably explain this subtle spiritual principle here in words, which are subject to argument and interpretation. But if the sincere soul meditates upon this with eagerness to please Godhead by the endeavor, it will become clear.
Arjuna felt himself to be separated from Kṛṣṇa, therefore he plunged into extreme doubt and grief. But by deeply contemplating the wisdom he received from Kṛṣṇa in Bhagavad Gita, Arjuna was able to rid himself of the grief that arises from dualism. He got rid of the duality (daita-saṁśaya) by dissolving it into spiritual energy, an energy that is beyond qualification (līna prakṛti-nairguṇyāt) by shapes (alinga) and manifestations (asambhava). Specifically, Arjuna felt that Kṛṣṇa was gone simply because his shape could no longer be tangibly seen manifest in the world. He got rid of this ignorance by realizing that Kṛṣṇa is everywhere at all times. The knowledge of Bhagavad Gita helped him realize this.
When he attained this realization his lamentation was finished (viśoka) and in its place he became filled with a wealth of spirituality (brahma-sampattyā). Another interpretation may be that his lamentation became very special, and purely spiritual as a result of realizing the non-duality of Kṛṣṇa and his simultaneous absence and presence.
Yudhiṣṭhira was very troubled about the road taken by the All-Attractive and the destruction of the Yadu family. Feeling lonely and alone, he made up his mind to himself follow the same road.
When Pṛthā [Kuntī] heard the Wealth Winner [Arjuna] speak of the Yadu’s destruction and the final destination of the All-Attractive, with undeviating and nakedly soulful divine love for the transcendent All-Attractive she ceased her material existence.
Arjuna’s mother gave up her life in Bhakti-Yoga Samadhi when she heard the horrible news from Arjuna.
One removes a thorn using another thorn and then discards both. Similarly the Unborn took a body to remove the burdens of the world and then discarded both. He grasps the forms of a fish and so on and then lets go of them, just like a magician. When they have relieved the world of her burdens, he lets go of that body.
When the All-Attractive Lotus Face in this world let go of his body, which is the subject for spiritual discussion and praise, right then and there Kali appeared, causing ill-fortune and underdevelopment of the mind and intellect.
Yudhiṣṭhira comprehended that serpent crawling forth through his city, state, and his home and even his own person. He saw greed, falsehood, trickery, violence and so on forming a wheel of immorality. So, he made ready to leave.
He had educated his grandson to be as qualified as him, and enthroned him to reign in Gajāhvaye City as the emperor of all the earth bordered by the seas.
Then he made Vajra the king of Śūrasena, in Mathurā. Having fulfilled his duties as a householder, he became capable to follow the inner fire.
Letting go of everything, his exquisite clothing and jewelry, without sense of “mine” and without selfishness, he completely cut off unlimited relationships.