The Apostle assumes that obedience in Romans 12:1-2 to present your body as a living sacrifice will be fulfilled in a local church. God did not just save us from his just wrath, but he saved us to his blood bought family, the church.
"Every service is a structure of acts and words through which we receive a sacrament, or repent, or supplicate, or adore. And it enables us to do these things best — if you like, it “works” best—when, through long familiarity, we don’t have to think about it. As long as you notice, and have to count, the steps, you are not yet dancing but only learning to dance. A good shoe is a shoe you don’t notice. Good reading becomes possible when you need not consciously think about eyes, or light, or print, or spelling. The perfect church service would be one we were almost unaware of; our attention would have been on God."