Starting from the last verse, a dog and a pig illustrate an unregenerate person. The vomit and mud symbolize a sinful lifestyle. On the one hand, you have the body ejecting something harmful from within, and the other is washed clean from the outside. Both illustrations, the dog and the pig: reflects a person who at one point did 180 degrees through the conviction of the Holy Spirit. However, the person’s change of lifestyle from sin to holiness was only momentary.