The source of all evil is Satan the Devil. In the revelation given to the apostle John, Jesus revealed that his anointed brothers have “conquered [Satan] because of the blood of the Lamb and because of the word of their witnessing. ”
(‏ يو ٨ :‏ ٤٤ ؛‏ ١ يو ٥ :‏ ١٩‏ )‏ وَقَدْ كَشَفَ يَسُوعُ لِيُوحَنَّا فِي ٱلرُؤْيَا ٱلْمُعْطَاةِ لَهُ أَنَّ إِخْوَتَهُ ٱلْمَمْسُوحِينَ « غَلَبُوا [ٱلْشَّيْطَانَ] بِدَمِ ٱلْحَمَلِ وَبِكَلِمَةِ شَهَادَتِهِمْ » .‏