According to Klaus Kießling, anthropology forms the bracket that holds together psychological, educational, diaconal and theological action and thinking in interdisciplinary discourse. Become a human being is – not only, but deliberately – a play on words and captures essential themes from the work of the pastoral psychologist and religious educator Klaus Kießling. Becoming human reflects the humanistic nature of the use of the term, which at the same time encompasses both the condition and the vision of the goal: We are human and will become human. The book with contributions from companions and students of Klaus Kießling combines practice-oriented and theoretical aspects, which in terms of content tie in with his diverse work and continue impulses.