We are all familiar with the famous dictum of Prosper of Aquitaine, who in the fifth century coined the axiom, lex orandi, lex credendi. I propose a variation on this principle by suggesting lex orandi, lex operandi, the law of prayer gives birth to the law of works, and my test case will be the early church before Gregory the Great. To take each of these themes separately would be a simple task. We are all familiar with early Christian treatises on worship and the histories of worship. We also possess numerous commentaries on early Christian attitudes toward society and the evidence of faith resulting in actions in and towards the world.
Volz, Carl A., "Lex Orandi, Lex Operandi: The Relationship of Worship and Work in the Early Church" (1987). Institute of Liturgical Studies Occasional Papers. 28.