 Nietzsche’s appeals to the notion of perspective (or, equivalently in his usage, to an “optics” of knowledge) have a positive, as well as a critical side. Nietzsche frequently criticizes “dogmatic” philosophers for ignoring the perspectival limitations on their theorizing, but as we saw, he simultaneously holds that the operation of perspective makes a positive contribution to our cognitive endeavors. Speaking of (what he takes to be) the perversely counterintuitive doctrines of some past philosophers, he writes,