Romans 12,1 is a very powerful and vibrant exhortation in Paul's paraenesis. The first of the paraenesis. All elements this verse contains are linked to its two major concepts: body and sacrifice. Proposing the concept of belonging as a key to Pauline spirituality, this present work studies the spirituality of Paul from the particular prespective of Rom 12,1. The theological method, permits us to theologically evaluate all the findings gained through the exegetical and phenomenological methods.