Bhagavad Gita

ಕ್ಲೈಬ್ಯಂ ಮಾಸ್ಮಗಮಃ ಪಾರ್ಥ ನೈತತ್ ತ್ವಯ್ಯುಪಪದ್ಯತೇ ।
ಕ್ಷುದ್ರಂ ಹೃದಯದೌರ್ಬಲ್ಯಂ ತ್ಯಕ್ತ್ವೋತ್ತಿಷ್ಠ ಪರಂತಪ ॥೩॥
klaibyaṃ māsmagamaḥ pārtha naitat tvayyupapadyate |
kṣudraṃ hṛdayadaurbalyaṃ tyaktvottiṣṭha paraṃtapa ||3||

Gist of the sloka:
Partha, do become a coward/impotent, is not for you. As a warrior like you, who put fear in the enemy hearts, remove the fear from your own heart and get up.
Continuing his shock therapy, Lord Krishna continues to motivate Arjuna by indicating he was not expecting Arjuna to be a coward. He asks Arjuna to throw away this layer of ignorance covering him and asks him to get up as the great warrior he is known to be.
The question arises as to why Lord Krishna was intent on the war? Knowing the destruction which follows the war.
If we analyse the thinking behind Lord Krishna intent on the war, we can easily see that the destruction of the society and vast majority of them would happen, when they come under the unjust evil ruler like Duryodhana. Whereas the war would only cause a small percentage of destruction but remove such evil ruler and his supporters protecting the majority of the society from harm.
Duryodhana who was a atathayi by committing all kinds of crimes including disrobing his own sister-in-law would have certainly used the same crimes against the society especially when there was none to protect them from such an evil group of persons. All such evil would have certainly amplified multiple times with a free hand to Duryodhana. This would have completely destroyed the society beyond all repairs.
Lord Krishna was looking at the society at large and not necessarily from the relationship or friendship perspective. It is therefore absolute necessary that one raise his voice against such evil irrespective of winnability or defeat. A lesson for all of us. Turning away from such situation is not an option as per Lord.
Lord Krishna gives a completely different and most appropriate definition of what is truth, what is dharma and concept or thoughts behind actions.
We were all told that saying the things as it is, is the truth. Lord Krishna tells what helps the society is the truth and what causes destruction to the society is falsehood. If by causing a small himsa [pain] it causes a larger benefit in stopping greater Himsa, than it is acceptable. A small Himsa preventing or establishing larger longer term ahimsa [non-cruelty/pain] is acceptable. Killing of a tiger which is attacking the village every day is much better than allowing it to continue on the same path causing greater pain for a longer duration. If a war establishes peace for a longer term and gives society some peace, then such a war is preferable. That which causes peace and safety to good people is truth. It is therefore necessary to understand the intent behind every action before judging it on results alone, rather than with just the limited view of action itself.