Science (episteme) -- Division of the sciences according to aims and objects -- Demonstration (apodeixis) -- The axioms of the sciences -- Being or substance (ousia) -- Being before aristotle -- Being in the categories -- The science of being: first philosophy -- Being in metaphysics zeta -- Nature (physis) -- Principles of change -- The four causes or explanations (aitiai) -- Defense of teleology -- Soul (psyche) -- Soul as substance, form and actuality -- What the student of soul investigates -- Perception -- Thought -- Success (eudaimonia) -- The practical science of ethics -- The chief and final good for human beings -- Virtues of character -- Virtues of intellect.