Even Kṛṣṇa, who is the Supreme Lord—He has nothing to do—He also sometimes thinks that, "I must fight with somebody. I must play. I must become subordinate to somebody." Therefore He comes. He becomes subordinate to Nanda-Yaśodā. That is pleasure. He becomes chastised. He fights with the demon. Some of the demons, they are devotees. Just like if I want to take massage, I find out my masseurs from my devotees with all strength. You see? I cannot go outside. Similarly, janmādy asya yataḥ (SB 1.1.1). The fighting spirit is there in Kṛṣṇa also. So when He wants to fight, in the Vaikuṇṭha there is no possibility of fight. Nobody will be able to fight. Nobody will agree to fight. So there is no fighting.
Fighting means must be inimical propensity. Unless you think, "I am your enemy," and I think, "You are my enemy," the fighting is not going on. If I think, "I am fighting with my friend," it will be false fighting. Fighting must be between two strong enemies. Therefore sometimes Jaya-Vijaya come. The question is that why the living entity falls down. It is not falls down. Just like Jaya-Vijaya came just to satisfy his master.
His master desired fighting, so some of His servant went to the material world and became great enemy, like Hiraṇyakaśipu, Rāvaṇa. For killing Rāvaṇa, Rāma is coming. Well, Rāvaṇa could not be killed without Rāma. If Rāma desired, millions of Rāvaṇas could be killed in one second. And why He is coming to . . . personally to fight with him? Just to satisfy a pleasure pastime that, "I shall fight." That is variety.