§579

This principle of integral observance of the Law not only in letter but in spirit was dear to the Pharisees. By giving Israel this principle they had led many Jews of Jesus' time to an extreme religious zeal. This zeal, were it not to lapse into "hypocritical" casuistry, could only prepare the People for the unprecedented intervention of God through the perfect fulfilment of the Law by the only Righteous One in place of all sinners.