The wolf, by its nature, is a wolf. Eventually the wolf will reveal itself by the howling or the fruit the wolf produces. When you deal with human beings, you must be discerning so you can identify the wolf. If you will watch, you will see the wolf does not eat what the sheep eat. A wolf is a meat eater.
Sheep eat or graze on grass or vegetable matter.
A sheep is a slow moving creature while the wolf can run with speed and agility. Although you can compare the physical attributes of wolves and sheep, looking at the physical differences between them does not really help you discern between the wolves and sheep in our faith. In our faith, you can discern the wolves from the sheep by the fruit they produce. Against such things there is no law. Every person produces fruit.