Ecclesiastes 8: 9 aptly says: “Man has dominated man to his injury. ” A further reason for suffering is “time and unforeseen occurrence. ”
فَٱلْبَشَرُ ٱلْخُطَاةُ يَمِيلُونَ بِطَبِيعَتِهِمْ إِلَى ٱلتَّنَازُعِ عَلَى ٱلسُّلْطَةِ ،‏ مِمَّا يُسَبِّبُ ٱلْحُرُوبَ وَٱلظُّلْمَ وَٱلْأَلَمَ .‏