Apologetic discussions often suffer from a lack of clarity concerning the definition of terms such as worldview, science, and Christian faith as well as their interrelation. This talk discusses the concepts underlying these terms focusing on the relation between Christian faith and atheism and the role of natural science. The results of this discussion will allow to reject frequent misleading accusations against the reasonability of Christian faith. (Duration 35 min, given 23.4.2020 at the European Leadership Forum 2020 – online)