Never stop pleading with those who are not receptive to the gospel. That seemingly hardhearted person may be thinking about every word you speak. We tend to overlook the fact that Jesus rebuked the hardhearted Pharisees and other religious leaders, because He cared enough about them to speak the truth. We do not know how many of them were in that great crowd on the Day of Pentecost and ended up being part of the Church, because of His love.
2 Chronicles33:10 And the Lord spake to Manasseh, and to his people: but they would not hearken. 11Wherefore the Lord brought upon them the captains of the host of the king of Assyria, which took Manasseh among the thorns, and bound him with fetters, and carried him to Babylon.