Based on observations and in-depth interviews with Catholic Religious Education teachers in Italy, this sociological study tackles “spirituality” as a register of legitimization in their professional settings. Compared with more established topics of “religious culture”, the motives of “spirituality” appear as a lesser category of justification in teachers’ discourse in two significant aspects: teaching about “spirituality” as a necessary component of human experience, and talking about their own relationship to “spirituality” as proof of sincere commitment and/or professionalism. Thus, in the context of teachers’ labor, “spirituality” constitutes an ambivalent category that can serve the purposes of Catholic institutions as well as forms of criticism of authority.