human nature of messengers

بَلْ عَجِبُوٓا۟ أَن جَآءَهُم مُّنذِرٌ مِّنْهُمْ فَقَالَ ٱلْكَـٰفِرُونَ هَـٰذَا شَىْءٌ عَجِيبٌ

But they wonder that there has come to them a warner from among themselves, and the disbelievers say, "This is an amazing thing.