From the writings of Aristotle, Bacon sites seven reasons for emphasizing study of the individual or particular. The first is the fact that nature intended us to study individuals. Second, he states that experiences dictates it. Third, Bacon expounds that nature always does what is best. A universal is only a compilation of individual attributes is his fourth concept.
Universals are extrinsic to the particular is explained in the fifth statement.
The sixth is the most important reason to Bacon. The seventh is that Aristotle first purposed these and it is by his authority that Bacon was lead to pursue this line of reasoning. This teaching of Bacon's lead him to expound the need for experimentation to prove the truth of universal scientific facts. While he believed that man could come to the understanding of the world, Bacon would never have thought it possible without God having already revealed it to man. It is not within man to direct his own steps.