1. Preface; 2. 1. Introduction; 3. 1.1. The difficulty of understanding understanding; 4. 1.2. Understanding versus explanation, interpretation and translation; 5. 1.3. Aspects of a psycho-pragmatic theory of understanding; 6. 2. Significance and Understanding; 7. 2.1. Acceptance; 8. 2.2. What we understand when understanding; 9. 2.3. How we understand when understanding; 10. 2.4. Presentification and describability; 11. 3. Perspectival Understanding; 12. 3.1. Prolegomena; 13. 3.2. Fregean interlude; 14. 3.3. phi(p*...); 15. 3.4. pi[phi(p*...)]; 16. 4. Contextualism and Transcendentalism in the Theory of Understanding; 17. 4.1. Contextualism; 18. 4.2. Transcendentalism; 19. Footnotes; 20. References