68 By love, God has revealed himself and given himself to man. He has thus provided the definitive, superabundant answer to the questions that man asks himself about the meaning and purpose of his life.
69 God has revealed himself to man by gradually communicating his own mystery in deeds and in words.
God is gradually communicating His own mystery; therefore, when the Magisterium of the Church teaches something that seems "new" to us, it is actually a more in depth revelation of the mystery of God. We, limited creatures, cannot pretend that we already know it all and that the Church has nothing to add to what we understand of it. The Church is our Mother and She continue teaching us the mysteries of revelation.
70 Beyond the witness to himself that God gives in created things, he manifested himself to our first parents, spoke to them and, after the fall, promised them salvation (cf ⇒ Gen 3:15) and offered them his covenant.
71 God made an everlasting covenant with Noah and with all living beings (cf ⇒ Gen 9:16). It will remain in force as long as the world lasts.
72 God chose Abraham and made a covenant with him and his descendants. By the covenant God formed his people and revealed his law to them through Moses. Through the prophets, he prepared them to accept the salvation destined for all humanity.
73 God has revealed himself fully by sending his own Son, in whom he has established his covenant for ever. the Son is his Father's definitive Word; so there will be no further Revelation after him.
There has been different covenants, first with Adam "You are free to eat from any tree in the garden; but you shall not eat from the tree of the knowledge of good and evil, for when you eat from it you will certainly die." (Genesis 2:16-17); after the fall see (Genesis 3:15); then with Noah (Genesis 9:16), then with Abraham, then with Moses (the Ten Commandments), then after the Israelites made an idol our Lord commanded them more disciplinary laws. But the last and everlasting Covenant is with our Lord Jesus Christ who is the fulfillment of the Law and the Prophets (Matthew 5:17) (Luke 24:44) (John 1:45).
John 3:27; John 15:5; Matthew 19:26