Prabhupāda: The chanting the holy name of Kṛṣṇa, by this process they fully realize that the master, the Supreme Being, and engages himself always. These European, American boy, they are all educated. Not . . . in your country, of course, the young men . . .
Professor Durckheim: They are educated too.
Prabhupāda: Yes. So they are always engaged in devotional service. So unless there is some realization, how they can engage their time in this way? (break) "You are human being. You can eat. I have given you fruits. I have given you vegetables. I have given you food grains. I have given you milk, very nutritious, palatable, containing all vitamin A, B, C, D. And why should you kill animals? Why should we give trouble to the others?" This is self-realization, that "Here is another self. The same active principle is working there. The body is different. Why shall I kill him?" So they have realized it. Samaḥ sarveṣu bhūteṣu. Equal vision to all living entities that the self, that active principle, is working in the fish, in the insect, within the tree, within the plant, within the animals, within the birds and within me. This is self-realization. That active principle is soul, and the soul is migrating from one body to another as you are migrating from childhood to babyhood, babyhood to boyhood, boyhood to youthhood. So the soul is the same, the body is different. The body is material and the soul is spiritual. When one comes to this understanding, that is self-realization.