Christian monasticism is the devotional practice of individuals who live ascetic and typically cloistered lives that are dedicated to Christian worship. It began to develop early in the history of the Christian Church, modeled upon scriptural examples and ideals, including those in the Old Testament, but not mandated as an institution in the scriptures. It has come to be regulated by religious rules (e.g. the Rule of Saint Augustine, Anthony the Great, St Pachomius, the Rule of St Basil, the Rule of St Benedict,) and, in modern times, the Canon law of the respective Christian denominations that have forms of monastic living. Those living the monastic life are known by the generic terms monks (men) and nuns (women). In modern English, they are also known by the gender-neutral term "monastics". The word monk originated from the Greek monachos "monk", itself from monos meaning "alone".
Monks did not live in monasteries at first, rather, they began by living alone, as the word monos might suggest. As more people took on the lives of monks, living alone in the wilderness, they started to come together and model themselves after the original monks nearby. Quickly, the monks formed communities to further their ability to observe an ascetic life. According to Christianity historian Robert Louis Wilken, "By creating an alternate social structure within the Church they laid the foundations for one of the most enduring Christian institutions . . ." Monastics generally dwell in a monastery, whether they live there in community (cenobites), or in seclusion (recluses).
The basic idea of monasticism in all its varieties is seclusion or withdrawal from the world or society. The object of this is to achieve a life whose ideal is different from and largely at variance with that pursued by the majority of humanity, and the method adopted, no matter what its precise details may be, is always self-abnegation or organized asceticism. Monastic life is distinct from the "religious orders" such as the friars, canons regular, clerks regular, and the more recent religious congregations. The latter have essentially some special work or aim, such as preaching, teaching, liberating captives, etc., which occupies a large place in their activities. While monks have undertaken labours of the most varied character, in every case this work is extrinsic to the essence of the monastic state.