The word “spirituality” has become increasingly common. What does it mean? It is not limited to spiritual practices, such as meditation, but suggests the pursuit of a life shaped by a sense of meaning, values, and perhaps transcendence. Although the word is used in different religions, and by people with no religious beliefs, its origins were Christian and referred to living life under the influence of God’s spirit. Nowadays, in a consciously plural world, Christian spirituality has a specific content whose origins are the Jewish and Christian scriptures. In particular, Christian spirituality is associated with following the teachings of Jesus Christ or imitating his values. The main New Testament word for this is “discipleship,” which has two main elements. First, there is a call to personal transformation (conversion). Second, Christians are to continue the mission of Jesus to transform the world and to build the kingdom of a God of love. In that fundamental sense, Christian spirituality is inherently concerned with social transformation. In the Gospel of Matthew, this includes sharing in Jesus’ work of forgiveness and healing. In the Gospel of Mark it involves selfless service of others. The history of Christian spirituality is a varied story of ways of approaching discipleship. Needless to say, part of what makes Christian spirituality distinctive is its underlying beliefs—in other words, how it understands the reality of God, the value of the material world, human nature, and identity and how these interconnect. The great variety of spiritual traditions and writings within Christianity originated at different times and places. However, they are continually being adapted in the light of new historical and cultural contexts. Scholars have sometimes found it helpful to identify different types of Christian spirituality. Their choices vary, and the types are interpretative tools rather than straightforward descriptions. “Types” help us to identify distinctive styles of spiritual wisdom. The ascetical type, sometimes associated with monasticism, highlights discipline and detachment from material pleasures as the pathway to spiritual growth. The mystical type focuses on the desire for an immediacy of presence to, and intuitive knowledge of, God, frequently via contemplative practice. The active type promotes everyday life and service to other people as the context for spiritual growth. The aesthetic type covers a range of ways in which the spiritual journey is expressed in and shaped by the arts, music, and literature. Finally the prophetic type of spirituality embraces an explicit commitment to social justice and the transformation of society. Christian spirituality has become a major area of study. It is an interdisciplinary field shaped by scripture, theology, and Christian history, but which may also draw upon psychology, the social sciences, literature, and the sciences. The study of Christian spirituality is also “self-implicating,” in the sense that it is not treated in a purely theoretical way but includes a quest for practical wisdom. Finally, the traditions of Christian spirituality increasingly engage with important issues of social and cultural transformation, for example interreligious dialogue, peace and reconciliation, ecological questions, the future of cities, the world of business, and the meaning of healthcare.