अहो बत महत्पापं कर्तुं व्यवसिता वयम् |
यद्राज्यसुखलोभेन हन्तुं स्वजनमुद्यता: || 45||
यदि मामप्रतीकारमशस्त्रं शस्त्रपाणय: |
धार्तराष्ट्रा रणे हन्युस्तन्मे क्षेमतरं भवेत् || 46||
Alas, what a great sin we have resolved to undertake this extreme sin to slay our own kinsmen through our greed for the pleasures of the kingdom. Far better it would be for me if, with weapons in hand, the sons of Dhritarashtra kill me on the battlefield while I remain unresisting and unarmed.
Arjuna utters the above words and concluded his arguments to prove that not fighting this war will be the ultimate beneficial act.
Arjuna is so overcome with attachment and compassion towards his family and friends that he is finding fault even in the execution of his righteous duty.
His mind was churning out non-stop arguments to support his weak and helpless stance in the middle of the battlefield.
He was so convinced with his opinion of not fighting the war that his mind was trying to prove that as a beneficial act towards humanity.
Arjuna justifies his inaction by pointing out that they are fighting the war and are ready to slay their relatives just for the greed for the pleasures of the kingdom.
He lost the true vision for which the war was to be fought: restoration of Dharma and Annihilation of Adharma.
He was so blinded by compassion and attachment to the relatives of his mortal body that he was ready to be slain by them.
The Mighty Warrior who single-handedly defeated nearly all of the Kauravas in the Virata War was now standing in the middle of the battlefield ready to drop his weapons and allow his enemy to kill him unarmed without any resistance from his end.
All in all, that mighty warrior was ready to forgo his Ksatriya Ethics.
Shri Krishna was just listening to Arjuna this entire time to allow all of his arguments out of his system. The cup was overflowing and it would be worthless to pour in it, so it would be better to empty the cup first and then fill it. Shri Krishna was doing the same.