Our mind and body are undoubtedly separate from each other. A mind can survive without a body, and similarly, a body is only the home of the mind. In the Meditations, Descartes describes this concept in his dualist theory in the second of the multiple Meditations. We can come to this conclusion by first understanding that the mind can survive any destruction of the body, and then realizing that you are identical to your mind and not your body. In other words, you are your thoughts and experiences, not your physical body. Finally, you cannot doubt your own existence, because the act of doubting is itself an act of thinking, and to think is to exist as a “thinking thing” or Res Cogitans. The first step to rationalizing that your mind is separate from your body is to understand that you exist; that you are real. To prove that you really exist, you must first entertain the thought “I don't exist.” Since you are entertaining your thought, it is real; therefore, if you have a real thought, you are also real. There is no way to doubt anything, because the act of doubting makes you a doubter, which in turn makes you real. Likewise thinking makes you a thinker. This is also known as Descartes' famous dictum “logito ergo sum” or “I think, therefore I am”. This suggests that we are “thinking things” or what Descartes calls “Res Cogitans”. So, you are your mind and not your body, and you can certainly exist without your body. Here's one way to visualize this concept of existence: Suppose that everything you think you know about the physical world is false. Instead, there is an evil genius who is unimaginably powerful and whose sole purpose is to be able to prevent you from having any beliefs. In other words... middle of the paper... The theory is instrumental in explaining how the mind can be considered a separate entity from the body. We can come to this conclusion by first understanding that we are real and that we cannot logically doubt our very presence, because the act of doubting is thinking, which makes you a thinker. Next, we realize that the mind, and all its experiences and thoughts, will remain the same, regardless of the changes or destruction the body undergoes. Then we can understand that we are our mind and not our physical body. We can use a number of examples to illustrate these concepts, including the movie The Matrix. Finally, we can refute John Locke's objections to dualist theory by identifying that the mind is capable of conscious and unconscious thought; therefore it cannot be divisible like the body. So the mind is a separate entity from the body.