'Ibn al-Qayyim رحمه الله: “What we love today will catch up with what we hate tomorrow, and what we hate today will catch up with what we love tomorrow.”
"If a man harms you, and you become his enemy, it means that you are not a believer.
It means you do not believe that his action was from your Lord’s will, that all things are from Allah.
If we believe, we must be patient with each other’s actions. Allah is trying our faith, each of us with others. We must see, therefore, that all actions are from our Lord’s will."