|Chapter 2||The Eternal Reality of the Soul's Immortality||Verse 26|
Rudra Vaisnava Sampradaya:
Thus it has been stated by authoritative testimony that because the soul is neither subject to birth or death there is no need to lament. Now it is being stated that even if one erroneously believes that the eternal soul is perpetually born when the body is born and perpetually dies with the death of the body then and still there is no need for lamentation. Since both virtue and sin with their resultant reactions of birth and death are also attached to the soul perpetually there is still no need to lament.
Brahma Vaisnava Sampradaya:
Even though the immortal soul is eternal, because of its constant connection and disconnection with the physical body from time immemorial it believes it is experiencing birth and death.
Now begins the summation.
Thus exists this expansive samsara known as the endless cycle of birth and death in the material existence. Until and unless the living entity has attained liberation from the material existence, one is subject to the stringent laws of endless births and deaths in different physical bodies as ordained by the material nature and so are following natural order. Therefore by possessing even this small amount of knowledge there is no need to worry.
In the Shabda Nirnaya it is stated:
Eternal and permanent the immortal soul is known to be and also the immortal soul is eternally in accordance with the cosmic order.
Understanding in the knowledge that there is a cosmic order to existence one should not grieve.
Sri Vaisnava Sampradaya:
Here the Supreme Lord Krishna gives Arjuna another reason not to lament for He states that even if one considers the eternal soul to be the same as the physical body which is subject to incessant births and deaths and not a separate and distinct reality; then still there is no need for grief because from birth the ageing of the physical body due to the passage of time leads to death and birth and death is a law of nature in the material existence and unavoidable.
Kumara Vaisnava Sampradaya:
In this way after establishing the eternal reality of the souls immortality according to the authority of Vedic scripture, the Supreme Lord Krishna describes that it is not intelligent to lament about it, even if one accepts the hypothesis of the Digambaras who believe that the soul is the same size as the body and is born and experiences death along with the body. This is referred to by the particle atha meaning if however, indicating according to another view. Accepting even this other view that the soul is constantly being born and constantly dying there is still no reason to lament about it and the reason why Lord Krishna reveals in the next verse.