"Go! I am sending you out like lambs among wolves."
This is a very dangerous mission we are called to. At every moment we are in danger of being devoured if we are not careful. Jesus gives us careful instructions on what to do lest we find ourselves in some serious trouble. The life of one called to be an apostle is one that needs to be handled with the utmost care. When one is in a position to share the Gospel, mistakes cannot be afforded. This entire mission is life or death as lives hang in the balance.
Your enemy is prowling about like a lion waiting to devour someone who stumbles; Do not give him the chance. It takes but one thief to break into a house to let the rest in. Though a single flake of snow may not seem like much, over time and repetition it can amount to a serious problem. So take heed to yourselves and make sure that you do not falter in this task given to you.
No one in a position of authority can ever commit a small sin. Those who teach will be judged more harshly. Far be it that we sin while everyone's eyes are upon us! For he who causes any of these little ones to stumble, it would be better if he were thrown into the sea with a large millstone around his neck. It would be worse than if he never served at all. Do not take God's calling lightly.