Through his work as a physician, Karl König explored the relationship between the rhythm of the seasons, the Christian festivals, thinking in particular about their effect on human beings and communities. This fascinating collection of König's essays, lectures and notes looks at the cycle of the year and the different aspects of all the Christian festivals, from Easter to the Twelve Holy Days of Christmas. König discusses the idea that human beings can derive inner strength from festival celebrations through an active social life and participation in community, and also that a strong, healthy community life relies on the celebration of festivals.