Then it adds that the BOOK which is sent down to you is a `DISCRIMINATOR' or a criterion which is a true standard of right and wrong. The verse then implies that, after sending so many clear signs and miracles; for those who deny and reject, there remains no other resort, but to chastise them severely. And to put an stress on the matter that God can, and will easily fulfill His threats and promises. The verse ends in that: ``Allah is Mighty and the Lord of Revenge.''