Sridhara Swami's Commentary
I am not withdrawing from battle out of cowardice but because it is improper to attack my superiors. This is what Arjuna meant by asking the Supreme Lord Krishna: How shall I fight against Bhishma and Drona? When it is wrong to even speak of fighting against them, how can I then even consider actually fighting them. This is the factual meaning of these words expressed by Arjuna.