This article examines the relation between secularities, technologies of the self, and citizenship through an ethnography of Islamic education in Portugal. For the Islamic Community of Lisbon, the main institutional representative of Islam in Portugal, religious education is about the formation of religious subjects and the creation of embodied dispositions in relation to Islam. But it is also about being able to explain to others, Muslims and non-Muslims alike, what Islam is. This project for Islamic education has to be understood, I will argue, in the context of the production of a public Islam, secularized and liberal, that is tied to claims to citizenship made in Portuguese society for more than 60 years. While these discursive formations are partly a way to counteract stigma, it is also essential to understand them within the creation of a post-confessional Portuguese society. For members of the Islamic Community of Lisbon, supporting a project of secularization of the public sphere in such a historical context is a way to affirm their belonging.