6. What does God reveal to man?God in his goodness and wisdom reveals himself. With deeds and words, he reveals himself and his plan of loving goodness which he decreed from all eternity in Christ. According to this plan, all people by the grace of the Holy Spirit are to share in the divine life as adopted “sons” in the only begotten Son of God.
Further reading: CCC 50-53, 68-697. What are the first stages of God's Revelation?From the very beginning, God manifested himself to our first parents, Adam and Eve, and invited them to intimate communion with himself. After their fall, he did not cease his revelation to them but promised salvation for all their descendants. After the flood, he made a covenant with Noah, a covenant between himself and all living beings.
Further reading: CCC 54-58, 70-71