"Do not
give dogs what is sacred; do not throw your pearls to pigs. If you do,
they may trample them under their feet, and turn and tear you to pieces." (Matthew 7:6)
As Christians, we have an obligation to give the gospel to others and hold fellow believers accountable. This is not an option: it is a command. However, there comes a point where you run into people who simply don't want to hear what you have to say. They clamp their hands over their ears and sing "Lalalalalala!" before you can even open your mouth. Or they shout at you until you stop talking. These are the kind of people being referred to in this verse. These folks are not to be confused with people who are simply stubborn, because very often, stubborn people, after digging their heels in for a while, realize that they need to change...eventually. The "dogs and pigs" referred to here are completely unreasonable, savage beasts and you don't just find them in prison. You encounter them at work, at church, even in your family. Most of the time, they will pretend to be well-adjusted, sane individuals so that they can get what they need from society. However, if you try to talk them out of doing something sinful, they will quickly show their true colors and you will find yourself on the wrong side of Harvey Dent's coin toss. Oh, and God help you if you try to witness to them. So basically, if you realize that the person who you are dealing with is completely unreasonable and hardhearted, stop wasting your time on them. You'll only make them mad, and they will only drive you crazy. If they are truly unstable, they may even try to attack you physically, although in my experience, this is pretty rare. Other than praying for them, you are better off just leaving them alone (although you should contact the authorities if things truly get out of hand). There are plenty of people who are willing to listen to the gospel and constructive criticism. It would be better to focus on them.
