Roman Catechism 3.2

Chapter 3 — Part I: The Creed — Article I: I Believe in God, the Father Almighty, Creator of Heaven and Earth

Section 2. Let this serve as a brief summary of this first Article. But since great mysteries lie concealed under almost every word, the pastor must now give them a more careful consideration, in order that, as far as God has permitted, the faithful may approach, with fear and trembling, to contemplate the glory of His majesty.