Hawzah News Agency - Muhammad ibn Yahya has narrated from in a marfu‘ manner that Amir al-Mu’minin said:

مَنِ اسْتَحْكَمَتْ لِي فِيهِ خَصْلَةٌ مِنْ خِصَالِ الْخَيْرِ احْتَمَلْتُهُ عَلَيْهَا وَاغْتَفَرْتُ فَقْدَ مَا سِوَاهَا وَلا أَغْتَفِرُ فَقْدَ عَقْلٍ وَلا دِينٍ لانَّ مُفَارَقَةَ الدِّينِ مُفَارَقَةُ الامْنِ فَلا يَتَهَنَّأُ بِحَيَاةٍ مَعَ مَخَافَةٍ وَفَقْدُ الْعَقْلِ فَقْدُ الْحَيَاةِ وَلا يُقَاسُ إِلا بِالامْوَاتِ.

“If one would establish firmly in himself one good quality for me I will credit him for it and forgive his other shortcomings but I will not forgive him for his losing intelligence and religion because departing religion is departing peace and security. Thus, life with fear and insecurity is unpleasant. Loss of intelligence is loss of life. A person without intelligence can be compared with no other thing but the dead.”

Al-Kāfi, v.1