When the senses are engaged only for the service of Kṛṣṇa, Hṛṣīkeśa, then there is no need of practicing yoga. Automatically they are locked up in the service of Kṛṣṇa. They have no other engagement. That is the highest. Therefore Kṛṣṇa says,
- yoginām api sarveṣāṁ
- mad-gatenāntarātmanā
- śraddhāvān bhajate yo māṁ
- sa me yuktatamo mataḥ
- (BG 6.47)
"A first-class yogi is he who is always thinking of Me." Therefore this chanting of Hare Kṛṣṇa mantra, if we simply chant and hear, the first-class yogi. So these are the process. So Kṛṣṇa wants to Arjuna that "Why you are indulging in this weakness of mind? You are under My protection. I am ordering you to fight. Why you are denying?" This is the purport.