Practical and theoretic life--Insufficiency of descriptive distinctions --Insufficiency of the psychological method in philosophy--Necessity of the philosophical method--Constatation and deduction--Theories which deny the practical form of the spirit--The practical as an unconscious fact: critique--Nature and practical activity--Reduction of the practical form to the theoretical: critique--The practical as thought in action--Recognition of its autonomy. II NEGATION OF THE SPIRITUAL FORM OF FEELING 21 The practical and the so-called third spiritual form: feeling--Various meanings of the word: feeling, a psychological class--Feeling as a state of the spirit--Function of the concept of feeling in the History of philosophy: the indeterminate--Feeling as forerunner of the æsthetic form--In Historic: preannouncement of the intuitive element--In philosophical Logic: pre-announcement of the pure concept--Analogous function in the Philosophy of the practical--Negation of feeling--Deductive exclusion of it. III RELATION OF THE PRACTICAL ACTIVITY WITH THE THEORETICAL 33 Precedence of the theoretical over the practical--The unity of the spirit and the co-presence of the practical--Critique of pragmatism--Critique of psychological objections--Nature of theoretic precedence over the practical: historical knowledge--Its continual mutability--No other theoretic precedent--Critique of practical concepts and judgments--Posteriority of judgments to the practical act--Posteriority of practical concepts--Origin of intellectualistic and sentimentalistic doctrines--The concepts of end and means--Critique of the end as plan or fixed design--Volition and the unknown--Critique of the concept of practical sciences and of a practical Philosophy. IV INSEPARABILITY OF ACTION FROM ITS REAL BASE AND PRACTICAL NATURE OF THE THEORETIC ERROR 53 Coincidence of intention and volition--Volition in the abstract and in the concrete: critique--Volition thought and real volition: critique--Critique of volition with unknown or ill-known base --Illusions in the instances adduced--Impossibility of volition with erroneous theoretical base--Forms of the theoretic error and problem as to its nature--Distinction between ignorance and error: practical origin of latter--Confirmations and proofs--Justification of the practical repression of error--Empirical distinctions of errors and the philosophic distinction. V IDENTITY OF VOLITION AND ACTION AND DISTINCTION BETWEEN VOLITION AND EVENT 73 Volition and action: intuition and expression--Spirit and nature--Inexistence of volitions without action and inversely--Illusions as to the distinctions between these terms--Distinction between action and succession or event--Volition and event--Successful and unsuccessful actions: critique--Acting and foreseeing: critique--Confirmation of the inderivability of the value of action from success--Explanation of facts that seem to be at variance. VI