Current discussions on the meaning and objective of religious education in schools are also debating the denominational profile of such education. This study aims to determine this profile more precisely by defining religious didactics as part of the exercise of Christian faith. Thus, the study not only links religious learning with the Christian practice of faith but also provides guidance in determining and ascertaining this practice of faith in learning processes. In doing so, the study makes a statement from a Catholic perspective on the learnability of faith.