للإمام علي "عليه السلام":نهج البلاغة
أحبب حبيبك هوناً ما عسى أن يكون بغيضك يوماً ما، وأبغض بغيضك هوناً ما عسى أن يكون حبيبك يوماً ما
Imam Ali, peace be upon him, said: Have love for your friend up to a limit, for it is possible that he may turn into your enemy some day; and hate your enemy up to a limit for it is possible that he may turn into your friend some day
Imam Ali