 The human mind, like God, contains ideas. Some of these ideas—sensory images, qualitative “feels” (like pains and pleasures), perceptual data—, and figments of the imagination are imprecise qualitative phenomena, being the expression in thought of states of the body as it is affected by the bodies surrounding it. Such ideas do not convey adequate and true knowledge of the world, but only a relative, partial and subjective picture of how things presently seem to be to the perceiver. There is no systematic order to these perceptions, nor any critical oversight by reason. “As long as the human Mind perceives things from the common order of nature, it does not have an adequate, but only a confused and mutilated knowledge of itself, of its own Body, and of external bodies” (IIp29c). Under such circumstances, we are simply determined in our ideas by our fortuitous and haphazard encounter with things in the external world. This superficial acquaintance will never provide us with knowledge of the essences of those things. In fact, it is an invariable source of falsehood and error. This “knowledge from random experience” is also the origin of great delusions, since we—thinking ourselves free—are, in our ignorance, unaware of just how we are determined by causes.