I Transformations of Concepts.- I. Types of Knowing.- II. Echoing the Classical Distinctions.- III. Craftsmanship as Knowledge.- IV. Reason and Its Realization.- V. Theory, Praxis, and Speculation.- VI. History Replacing Speculation.- VII. Systems of Thought and Their Consequences.- Two Understanding and Activity.- VIII. Residues and Seeds.- IX. The Ways of the Understanding.- X. Discernment.- XI. Underivable Contents.- XII. Events and Acts.- XIII. Non-Preferential Primacy.- XIV. The Ethical Deed.- XV. The Technical Act and Technology.- Index of Names.- Index of Subjects.