Which term is concerned with the purpose of human life and the limits of knowledge?

The term that best encompasses the study of the purpose of human life and the limits of knowledge is philosophy. Philosophy is a broad field that explores fundamental questions regarding existence, reality, and the meaning of life. It delves into the nature of knowledge, ethics, and human thought, making it inherently concerned with both the purpose of life and the understanding of human limitations in comprehending that purpose.

While metaphysics specifically focuses on the nature of reality and what exists, it does not encompass all aspects of human purpose. Similarly, epistemology is focused on the nature and scope of knowledge itself and how we come to understand the world, without directly addressing the purpose of human life. Physics, on the other hand, is strictly a natural science concerned with the properties of matter and energy, and it does not engage with existential questions about human life.

Philosophy serves as the overarching discipline that connects these inquiries, making it the most fitting answer in relation to the purpose of human life and the limits of knowledge.