Roman Catechism 3.14

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

Section 14. This knowledge is contained in the Articles of the Creed, which disclose to us the unity of the Divine Essence and the distinction of Three Persons, and show also that God Himself is the ultimate end of our being, from whom we are to expect the enjoyment of the eternal happiness of heaven, according to the words of St. Paul: God is a rewarder of them that seek Him. How great are these rewards, and whether they are such that human knowledge could aspire to their attainment, we learn from these words of Isaias uttered long before those of the Apostle: From the beginning of the world they have not heard, nor perceived with the ears: the eye hath not seen besides thee, O God, what things thou hast prepared for them that wait for thee.