If he is interested in scientific things, he might respond when you mention points that show the Bible’s scientific accuracy.
أَمَّا إِذَا كَانَ يَهْتَمُّ بِٱلتَّارِيخِ ،‏ فَبَرْهِنْ لَهُ دِقَّةَ ٱلْكِتَابِ ٱلْمُقَدَّسِ ٱلنَّبَوِيَّةَ وَٱلتَّارِيخِيَّةَ .‏