The document discusses the difference between the body, soul, and supersoul. It summarizes a passage from the Bhagavad Gita where Arjuna asks Krishna to explain these concepts. Krishna responds that the body is called the "field" and the knower of the field is the soul within the body. However, Krishna notes that as the supersoul, he is present in all bodies and is the ultimate knower of all fields. Understanding the differences between the field, knower of the field, and supreme knower of all fields constitutes true knowledge.