In the first Meditation in Descartes’s Meditations on First Philosophy, Descartes’s prime motivation is his quest for certainty. He feels unstable, and he consents that the only way to achieve stability is to find truth and certainty in his beliefs. He soon realizes that the only way he can do this is to tear down every single one of his beliefs and then build them up again out of truth. He recognizes this as a cumbersome and daunting task so, to expedite his endeavor, he employs the use of Methodological Skepticism. The way in which Descartes uses Methodological Skepticism is as follows: if he can find the slightest shred of doubt in one something he believes in, he will discontinue believing in that thing. In order to disband all of his beliefs in one fell swoop, Descartes targets the principles on which all of his beliefs rest. He reasons that almost, if not all, of what we believe comes to us from our senses. Thus, Descartes begins to doubt the reliability of our senses by proposing what is called the Dream Argument. In the dream argument, Descartes argues that we cannot be sure of anything because we cannot be sure we are not dreaming. He argues that when we are dreaming, we are unaware that we are in a dream. He elaborates that while we are dreaming, our senses deceive us into thinking we are awake and physically performing the things we do in our dreams. So, in theory, it is possible in a dream for our senses to deceive us into thinking we have hands when in actuality we do not. Descartes also offers another possibility to why our senses may deceive us, and he does this in the form of the Evil Demon argument. In this argument, Descartes presents the possibility that we are being deceived by some sort of evil demon. He argues that if this is true, then we cannot rightly believe in anything because there is this evil demon that is deceiving us into thinking we know something that is false. In this argument, Descartes means to prove that we cannot know whether there is an evil demon or not, because if there were and he was deceiving us, we would have no way of knowing.