Roman Catechism 4.2

Chapter 4 — Part I: The Creed — Article II: And in Jesus Christ, His Only Son, Our Lord

Section 2. But as the fruit of these admirable blessings is best known by considering the ruin brought on man by his fall from that most happy state in which God had placed our first parents, let the pastor be particularly careful to make known to the faithful the cause of this common misery and calamity.