The Differences of Sensation and Intelligence

It is absurd to distinguish being, qualities, and differences by themselves. Sensation or intelligence tell us that those things are different without informing us of their reason. Besides, in each one of the operations of intelligence there is a special distinctive characteristic which enables it to distinguish different things. The science of grammar renders the mind grammatical, and the science of music renders the mind musical - these become specific differences. And how do the sciences of grammar or of music constitute differences?