In chapter 5 of Mark, we see what it means to usher in God’s kingdom and the power of the good news. Jesus shows his authority over evil spirits, sickness and even death itself. We’ve also previously seen how Jesus has power over sin. It’s Jesus’s power over all of these things that makes him the only candidate to be able to redeem us all forever. He has dominion over evil, sin and death; being able to irradiate it and free his people from it. Furthermore, this chapter reveals how Jesus removes everything that is impure.
First, we see Jesus remove a legion of impure spirits from the possessed man. The man lived in tombs, which automatically made him unclean, but he was also possessed by unclean spirits, which of course was the bigger issue here. He would have been a bloody, bleeding, dirty, ritually unclean , presumably naked mess. Jesus deals with this by allowing the impure spirits enter animals that were considered impure — pigs. (Note, that Jesus did not drive the pigs off the cliffs, the entry of the demons did.) The drowning of the possessed pigs echoed the drowning of Pharaoh’s army. Jesus was the new Moses, defeating the true enemy: the spiritual forces of evil.
In the second half of this chapter, Jesus interacts with two unclean people: one by virtue of her illness, the other because she is dead. However, Jesus is able to change their unclean states into those of being clean.
Therefore, if you ever feel too dirty, unclean or somehow damaged for Jesus, it is unlikely to be the case. You have to be more spectacularly unclean than someone possessed by a hoard of demons, someone who has been bleeding for years, or someone that is dead. So, it is reassuring that Jesus can restore us to cleanliness, no matter how bad it gets.