The Bhagavad Gita with Commentaries of Ramanuja, Madhva, Shankara and Others.
Bhagavad Gita 2.6
http://www.bhagavad-gita.us/articles/615/1/Bhagavad-Gita-26/Page1.html
By Bhagavan Sri Krishna
 

Text 6

na caitad vidmah kataran no gariyo
yad va jayema yadi va no jayeyuh
yan eva hatva na jijivisamas
te ’vasthitah pramukhe dhartarastrah

Translation

Nor do we know which is better—conquering them or being conquered by them. If we killed the sons of Dhritarashtra, we should not care to live. Yet they are now standing before us on the battlefield. 

Commentary by Srila Prabhupada 

Arjuna did not know whether he should fight and risk unnecessary violence, although fighting is the duty of the kshatriyas, or whether he should refrain and live by begging. If he did not conquer the enemy, begging would be his only means of subsistence. Nor was there certainty of victory, because either side might emerge victorious. Even if victory awaited them (and their cause was justified), still, if the sons of Dhritarashtra died in battle, it would be very difficult to live in their absence. Under the circumstances, that would be another kind of defeat for them. All these considerations by Arjuna definitely proved that not only was he a great devotee of the Lord but he was also highly enlightened and had complete control over his mind and senses. His desire to live by begging, although he was born in the royal household, is another sign of detachment. He was truly virtuous, as these qualities, combined with his faith in the words of instruction of Sri Krishna (his spiritual master), indicate. It is concluded that Arjuna was quite fit for liberation. Unless the senses are controlled, there is no chance of elevation to the platform of knowledge, and without knowledge and devotion there is no chance of liberation. Arjuna was competent in all these attributes, over and above his enormous attributes in his material relationships.

Commentary by Sri Visvanatha Cakravarti Thakur

Moreover I do not know if I shall be victorious or defeated even if I am prepared to kill them. And I do not know which will be better, victory or defeat: if I conquer them or they conquer me. And even if I am victorious, that also is defeat, for I will not want to live.