The Guide and Criterion: The necessity of the book and the criterion of truth.
They were given the Scripture (Torah) and the Criterion (*Al-Furqan*) to discern truth from falsehood and to find their way. Seek clear moral benchmarks. In a world of conflicting ideologies, rely on revealed Scripture to be your absolute standard of right and wrong. Without this 'Criterion,' we inevitably get lost in relativism.