Baruch Spinoza offers a three grade theory of knowledge in his Demonstrated in Geometric Order. This text offers the reader a concise and accessible theory of Spinozist epistemology that culminates in the third and highest form of knowledge—intuitive science (scientia intuitiva), which Spinoza considers the highest possible human achievement. Louis Russell offers the Spinozist picture of knowing in light of a grounding critique that mitigates Immanuel Kant's epistemic skepticism that the mind ever have access to the things themselves.