CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 706–709

706 Against all human hope, God promises descendants to Abraham, as the fruit of faith and of the power of the Holy Spirit. In Abraham's progeny all the nations of the earth will be blessed. This progeny will be Christ himself, in whom the outpouring of the Holy Spirit will "gather into one the children of God who are scattered abroad." God commits himself by his own solemn oath to giving his beloved Son and "the promised Holy Spirit . . . [who is] the guarantee of our inheritance until we acquire possession of it."
707 Theophanies (manifestations of God) light up the way of the promise, from the patriarchs to Moses and from Joshua to the visions that inaugurated the missions of the great prophets. Christian tradition has always recognized that God's Word allowed himself to be seen and heard in these theophanies, in which the cloud of the Holy Spirit both revealed him and concealed him in its shadow.
708 This divine pedagogy appears especially in the gift of the Law. God gave the Law as a "pedagogue" to lead his people towards Christ. But the Law's powerlessness to save man deprived of the divine "likeness," along with the growing awareness of sin that it imparts, enkindles a desire for the Holy Spirit. The lamentations of the Psalms bear witness to this.
709 The Law, the sign of God's promise and covenant, ought to have governed the hearts and institutions of that people to whom Abraham's faith gave birth. "If you will obey my voice and keep my covenant, . . . you shall be to me a kingdom of priests and a holy nation." But after David, Israel gave in to the temptation of becoming a kingdom like other nations. The Kingdom, however, the object of the promise made to David, would be the work of the Holy Spirit; it would belong to the poor according to the Spirit.