'Ali was heard to say to Ibn al-Kawwa', "Do you know what the first one said? 'Loving the one you love is an easy matter. It may be that one day he will be the one you hate. Hating the one who hate is an easy matter, It may be that one day he will be the one you hate.'"  

لِابْنِ الْكَوَّاءِ هَلْ تَدْرِي مَا قَالَ الأَوَّلُ؟ أَحْبِبْ حَبِيبَكَ هَوْنًا مَا عَسَى أَنْ يَكُونَ بَغِيضَكَ يَوْمًا مَا وَأَبْغِضْ بَغِيضَكَ هَوْنًا مَا عَسَى أَنْ يَكُونَ حَبِيبَكَ يَوْمًا مَا