Upon reading about and later researching  Kant's famous Categorical Framework, which is included as a key part of his classic Critique of Pure Reason (1781), I am struck by aspects that are quite basic and intuitive, like his definition of "Quantity" (unity, plurality, totality) which contrasts with a more difficult frame for "Modality" (possibility, existence, necessity). It is said this work was intended by Kant to represent a framework for all knowledge, but Kant's writing style has been described by many (most?) scholars as a challenge to unravel. How much of his original intention has been, as they say, lost in translation? Is there anyone considered authoritative on what the C.F. truly means?
 Tarnas (1991), The Passion of the Western Mind p. 341-347.