This article explores the implications for Christian religious education of the theory of moral virtues formulated by Thomas Aquinas and developed by the contemporary Neo-Thomists. The analysis is divided into two parts. The first part introduces Thomistic virtue theory and presents cardinal virtues crucial for Thomistic ethics: prudence, justice, temperance and fortitude, as the reference points for moral education. This part also includes analysis of the relationship between cardinal and theological virtues, leading to the conclusion that Christian religious education also requires the development of theological virtues. The second part explores, through Thomistic theory, what factors condition the development of a person's moral character (i.e. his/her moral virtues) and what those factors mean for supporting moral education within Christian religious education, initially within the context of Polish schooling. Particular attention is given to three issues: introducing the concept of responsibility for community members, introducing knowledge of moral virtues, and building a relationship with God.