Karl Heim has just completed two epochs in his theological biography. The first is a twenty-one year project entitled Der evangelische Glaube und das Denken der Gegenwart, a series of six volumes in which an impressive span of contemporary problems has been probed and illuminated by the Christian faith. The second is the golden anniversary of the literary effort which he initiated in 1902 with a volume entitled Psychologismus oder Anti-Psychologismus and which he has now rounded out with his Weltschöpfung und Weltende.