And even if one were able, generally speaking, to define ever so precisely what should be intended by Isaac (which moreover would be the most ludicrous self-contradiction, i.e. that the particular individual who definitely stands outside the universal is subsumed under universal categories precisely when he has to act as the individual who stands outside the universal), the individual nevertheless will never be able to assure himself by the aid of others that this application is appropriate, but he can do so only by himself as the individual.
