All religions,at least all monotheistic religions, say that the God is almighty ie. not an atom can move without His will.They also claim that the God is the embodiment of Goodness.He is all good,all pure.There lies the contradiction.If God is all-powerful why does he permit the evil to exist? If everything happens as per His will, how can all the sins,all the crimes,occur? It is the eternal riddle that no believer has ever explained satisfactorily,whichever religion he belongs to.