Roman Catechism 23.29

Chapter 23 — Part III: The Decalogue — Introduction on the Commandments in General

Section 29. Such having been their condition, he was closely united to them, and loved them, and Lord of heaven and earth as He was, He disdained not to be called their God. He desired that the other nations might thus be excited to emulation and that mankind, seeing the happiness of the Israelites, might embrace the worship of the true God. In the same way St. Paul says that by discussing the happiness of the Gentiles and their knowledge of the true God, he provoked to emulation those who were his own flesh.