Satsvarūpa: "As the embodied soul continually passes in this body from boyhood to youth to old age, the soul similarly passes into another body at death. The self-realized soul is not bewildered by such a change."
Prabhupāda: And now...
Prabhupāda: Yes, translate. (German) This is the basic principle of knowledge, that "I am not this body. I am the active principle within this body." Then further knowledge can be understood. This is the beginning of knowledge, that "I am not this..." At the present moment everything... That I was explaining to the professor, that we are accepting this body as self, and self-interest means this bodily interest. Explain this. (German) So the whole trouble is on the platform of this misconception that "I am this body." Therefore Kṛṣṇa begins from this platform what is knowledge. First of all one must know that "I am not this body." When he understands this basic principle of knowledge, then further knowledge can be advanced. That is explained very nicely step by step in this book Bhagavad-gītā.