The student will see that the process of Classification is two-fold. The first is by Analysis, in which the Genus is divided into Species by reason of _differences_. The second is by Synthesis, in which individuals are grouped into Species, and Species into the Genus, by reason of _resemblances_. Moreover, in building up general classes, which is known as Generalization, we must first _analyze_ the individual in order to ascertain its _qualities, attributes and properties_, and then _synthesize_ the individual with other individuals possessing like qualities, properties or attributes. Brooks says of Generalization: "The mind now takes the materials that have been furnished and fashioned by comparison and analysis and unites them into one single mental product, giving us the general notion or concept. The mind, as it were, brings together these several attributes into a bunch or package and then ties a mental string around it, as we would bunch a lot of roses or cigars.... Generalization is an _ascending_ process. The broader concept is regarded as higher than the narrower concept; a concept is considered as higher than percept; a general idea stands above a particular idea. We thus go up from particulars to generals; from percepts to concepts; from lower concepts to higher concepts. Beginning down with particular objects, we rise from them to the general idea of their class. Having formed a number of lower classes, we compare them as we did individuals and generalize them into higher classes. We perform the same process with these higher classes and thus proceed until we are at last arrested in the highest class, that of Being. Having reached the pinnacle of Generalization, we may descend the ladder by reversing the process through which we ascend."