When Scripture discusses the way in which God relates to the world, both in creation and in redemption, the persons of the Trinity are said to have different functions or primary activities. Sometimes this has been called the “economy of the Trinity,” using economy in an old sense meaning “ordering of activities.” (In this sense, people used to speak of the “economy of a household” or “home economics,” meaning not just the financial affairs of a household but all of the “ordering of activities” within the household.) The “economy of the Trinity” means the different ways the three persons act as they relate to the world and (as we shall see in the next section) to each other for all eternity.

 Grudem, W. (2020). Systematic Theology: An Introduction to Biblical Doctrine (Second Edition, p. 292). Grand Rapids, MI: Zondervan Academic.