Roman Catechism 37.31

Chapter 37 — Part IV: Prayer — The Third Petition: Thy Will Be Done on Earth as It Is in Heaven

Section 31. There are some who serve another with love, but who do so solely with a view to some recompense, which is the end and aim of their love; while others, influenced by love and loyalty alone, look to nothing else in the services which they render than the goodness and worth of him whom they serve, and, knowing and admiring his qualities consider themselves happy in being able to render him these services. This is the meaning of the clause On earth as it is in heaven appended (to the Petition).