This article aims at examining the effects of misa lingkungan on the ecclesial life of parishioners. The question is whether misa lingkungan has any transformative power for building a communion of parishioners? As a theoretical concept, the author takes some ideas developed by Kevin W. Irwin in his book Models of the Eucharist, as well as some of the main ideas of Pope John Paul II's encyclical Ecclesia de Eucharistica. Based on these theological concepts, the author conducted interviews and questionnaires aimed at the parishioners of St. Aloysius Gozaga Parish, Mlati, Semarang Archdiocese. He tries to find out how far the adage lex orandi – lex credendi – lex vivendi influenced the understanding and the living of the parishioners. The aut...