He says, "Nor can you guide the blind away from their error," meaning: the disbelievers, for they are blind to the guidance.
قَالَ ﴿وَمَا أَنْت بهاد الْعمي﴾ يَعْنِي: الْكُفَّارَ هُمْ عُمْيٌ عَنِ الْهدى (إِن