Dangers of vanity and self-conceit
"If they were not committing sins, I would fear for you something greater than that: self-conceit, self-conceit."
"لَوْ لَمْ يَكُونُوا يُذْنبُونَ لَخَشيتُ عَلَيكُمْ مَا هُوَ أَكْبَرُ مِنْ ذَلكَ، الْعُجْبَ الْعُجْبَ".