The concept of natural law had no place in Torah. Yet Paul – as he struggled to define the law that he believed, in the wake of the crucifixion and the resurrection, to be written on the heart of all who acknowledged Christ as Lord – did not hesitate to adapt the teachings of the Greeks. The word he used for it – syneidesis – clearly signalled which philosophers in particular he had in mind. Paul, at the heart of his gospel, was enshrining the Stoic concept of conscience.