The fact that we are susceptible to tumas meis, a impure state which comes upon one when he is in contact with a dead person. Proves how we are holy therefore when a Yid who's soul is holy leaves him, all the klipot (forces of evil) want to cling to his body. They want to cleave to any small amount of kedusha they can. As their whole existence is only possible inasmuch they are connected to the kedushah. That is the reason why it says זאת חקת התורה- that kedushah- heiligkeit - came upon us when we got the Torah....