Our bodily senses, both external and internal, are our primary contact with the outside world. The total impressions of stimuli on the senses constitute sense knowledge.
Sense knowledge is common to man and beasts. But man is beyond the limitations of the senses. By his intellectual power of abstraction, he attains a level of intellectual knowledge.
While sense knowledge is material, concrete and particular, intellectual knowledge. While sense knowledge is spiritual, abstract and universal. Simple apprehension is the first act of the intellect.