 One kind of extended body, however, is significantly more complex than any others in its composition and in its dispositions to act and be acted upon. That complexity is reflected in its corresponding idea. The body in question is the human body; and its corresponding idea is the human mind or soul. The human mind, then, like any other idea, is simply one particular mode of God’s attribute, thought. Whatever happens in the body is reflected or expressed in the mind. In this way, the mind perceives, more or less obscurely, what is taking place in its body. And through its body’s interactions with other bodies, the mind is aware of what is happening in the physical world around it. But the human mind no more interacts with its body than any mode of thought interacts with a mode of extension.