[Note] that the human being is the most intelligent animal of all, and has the most accurate taste, which is [a sort of] touch, since he is the most delicate and sensitive with regard to touch. For the secretions dissipate faster, and do not make turbid his [faculties of] imagination and reasoning. It should be known that flesh never can be alleged as being a material cause, for insofar it is a contributory [cause][1] it does not produce intelligence. For the movements of the soul, because of their bond, are sympathetically affected by mixture with the body, [and] even though they are not engendered by the mixture, they do not operate such or such a thing without such a mixture. However, if there are some other things having a flesh more delicate than that of man, such as worms, they would obviously be inferior in other respects. For they do not have the complete faculty of imagination; but now we are discussing complete animals. But perhaps the flesh of worms [is not softer], as that of flies is not either. [Note], however, that the human being, on account of having his flesh more delicate, is more intelligent. A sign of it is the fact that the more delicate of men are more intelligent and more noble-natured, and [and the people having] all the other dispositions and natural peculiarities are similarly disposed. This is also why we call stupid people “thick-skinned.”