 Leibniz’s conception of an ideal metaphysics was incredibly ambitious. He made impressive progress on the project during his career, though he fell well short of attaining his lofty ideal. Some of Leibniz’s very early texts contain stretches of argument that are not carefully divided into axioms, definitions, propositions, and demonstrations, but which could be reconstructed to fit that model. Consider, for example, Leibniz’s unpublished 1672–3 Confessio Philosophi (The Confession of a Philosopher). Towards the beginning of this work, after providing definitions of “God”, “justice”, “love”, and “harmony”, he demonstrates that “happiness consists in the most harmonious state of mind” (A VI.iii.117; CP 31). Leibniz then argues (in the voice of The Philosopher):