Theology is a science whose essential aim is to serve faith. For Albert Mantel, it is clear that this can only be achieved if it presents its central content in a language that is easy to engage with. In the first part, he approaches the foundations of biblical Christianity in an accessible narrative style. The second part describes milestones on the journey of faith, where the church accompanies believers throughout their lives. In the manner of the previously introduced small books on theology for the afternoon, Albert Mantel addresses topics such as the doctrine of the sacraments, the covenant concepts of the Old and New Testaments, the biblically existential intersections of Christian and Jewish psalmists, the proclamations of the prophets and the Kingdom of God, or an approach to the figure of Jesus in nine self-contained yet interrelated contexts.