The first part of this essay develops the idea of logic as the science of thought, articulating, and thus being, the self-consciousness of thought. It explains that logic, so understood, is nothing other than metaphysics, the science of what is in so far as it is. Self-consciousness, then, thought itself, is not empty, but the source of all content. The second part of the essay discusses the opening paragraphs of Hegel’s Science of Logic; it shows how, in these paragraphs, thought is revealed to be the source of its own content in virtue of its original negativity. Thus the second part begins to make concrete the idea of logic provided by the first.