Aliya Summary: We learn of the possibility of foods and utensils contracting ritual impurity if they come in contact with any of the aforementioned impurities. The Torah then mentions the impurity contracted through coming in contact with the carcass of a kosher animal which was not ritually slaughtered. We are commanded not to consume any insects or reptiles. The reading closes with an exhortation that we remain holy by abstaining from eating all forbidden foods.
All of the above is meant to elevate the Jew’s soul to the sanctity that G-d wanted us to attain. For us, there is a direct link between body and soul, the spiritual and the mundane. The laws of kashrut bring the point home.