Allah tells us how He deals with His creation and how His rulings are carried 
out. He tells us that there is none who can put back His judgement, for whomever 
He guides cannot be led astray,
[وَمَن يُضْلِلْ 
فَلَن تَجِدَ لَهُمْ أَوْلِيَآءَ مِن دُونِهِ]
(and whomever He leaves astray can never find helpers other than Him)to guide 
him. As Allah says:
[مَن يَهْدِ اللَّهُ 
فَهُوَ الْمُهْتَدِ وَمَن يُضْلِلْ فَلَن تَجِدَ لَهُ وَلِيًّا مُّرْشِدًا]
(He whom Allah guides, he is the rightly-guided; but he whom He sends astray, 
for him you will find no Wali (guiding friend) to lead him) [18:17]