You are ministering. Their heart is not swayed. How do you know it is time to let go and stop ‘casting pearls’?
There was a down-on-his-luck guy in my church who asked everyone for money, rides, food, references, and a place to stay. The guy was obnoxious but we thought the “Christian duty” was to help him out. My former pastor and I poured tons of our time and money into him, hoping he would better his own life.
Soon we find out the guy was using money on stupid things he couldn’t afford, unable to hold a job because he didn’t like being told what to do, and he was trying to date the teen girls in the youth group.
Eventually we all rallied to stop helping him. As bad as we felt, we refused to give him anything else: and in the long run, cutting him off actually helped him.
As for you, this is really a case-by-case scenario that will require crazy wisdom and discernment. But Jesus doesn’t leave us blind on this one.
Let’s examine the verse you’re talking about. Jesus only says this line only once in his famous Sermon on the Mount in Matthew 7:6 —
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 then turn and tear you to pieces.
Jesus is actually drawing some boundaries. Earlier he says to not judge your brother but instead to first examine the plank in your own eye, and then you can take the speck out of theirs. It was a way of humbly restoring your stumbling brother.
But in this verse, he’s talking about the other extreme: if there is someone who is using or abusing you, feel free to walk out or call the police.
The problem though is that we run to this verse a little too soon. If there’s one thing I know, Jesus calls us to love no matter what. And love will cost you. It’s a sacrifice. It hurts.