Is there a law of obedience for man? Yes, this is evident from the Holy Scriptures which define sin as the transgression of the law. 'Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.' (1 John 3:4). Indeed if sin did not have a God given definition then all scriptural exhortations against sin would be meaningless. The confessions and creeds of the Reformed churches affirm that there is a rule of obedience set out in scripture, that