What is chrismation? Nicholas Denysenko breaks open chrismation as sacrament of belonging by exploring its history and liturgical theology. This study offers a sacramental theology of chrismation by examining its relationship with baptism and the Eucharist and its function as the ritual for receiving converts into the Orthodox Church. Drawing from a rich array of liturgical and theological sources, Denysenko explains how chrismation initiates the participant into the life of the triune God, beginning a process of theosis, becoming like God. The book includes a chapter comparing and contrasting chrismation and confirmation, along with pastoral suggestions for renewing the potential of this sacrament to transform the lives of participants.