We have to understand that fighting spirit is there in everyone. You cannot check it, you cannot stop it. We do not say stop. The Mayavadi philosopher says that "You stop this thing," but that is not possible. You cannot stop. Because you are living entity, you have got all these propensities. How you can stop it? But it should be utilized properly. That's all. You have got the fighting spirit. How to utilize it? Yes. Narottama dasa Thakura recommends, krodha bhakta-dvesi-jane: "Those who are envious of God or God's devotee, you can utilize your anger upon them." You can utilize. The anger you cannot give up. Our business is how to utilize it. That is Krsna consciousness.
Lecture on Bhagavad-gita 2.6, London, August 6, 1973