The content of this chapter is Wilfrid Sellars’s familiar distinction between the manifest and the scientific image of “the man the world”. The discussion begins with a discussion of Paul Oppenheim and Hilary Putnam’s argument for the unity of science, which I guess might have been the inspiration for Sellars. His distinction rests on the observation that science becomes increasingly abstract in its attempt to understand the world and thereby widen itself from common sense experience and ordinary knowledge. The consequence of this development is that human beings are left with two competing descriptions of reality and their own place in nature, both of which are supported by arguments of why it should be considered superior to the other image. According to the manifest image, human beings are rational creatures, able to represent the world around them such that it becomes meaningful. They have a language by which they can define what is true and what not, what is rational and what not, and by which they can formulate and express epistemic norms, as well as ethical and esthetic values. Within the manifest image, conscious human beings are the measure of all things. Sellars thought that neither of the two pictures could replace the other, the reason being that from an epistemological point of view the scientific image presupposes the manifest image, but from an ontological point of view the relationship seems reversed. The manifest image cannot explain the evolution of human beings as well as all the changes in the empirical world.