 Kant’s mistake, then, was that he regarded reason or rationality as only in our heads, Hegel suggests (EL §§43–44), rather than in both us and the world itself (see also below in this section and  section 4).  We can use our reason to have knowledge of the world because the very same reason that is in us, is in the world itself as it own defining principle. The rationality or reason in the world makes reality understandable, and that is why we can have knowledge of, or can understand, reality with our rationality. Dialectics—which is Hegel’s account of reason—characterizes not only logic, but also “everything true in general” (EL Remark to §79).