Not infrequently, contrary to the promptings of the Spirit, the life of the Church can become a museum piece or the possession of a select few. This can occur when some groups of Christians give excessive importance to certain rules, customs or ways of acting. The Gospel then tends to be reduced and constricted, deprived of its simplicity, allure and savor. It can affect groups, movements and communities, and it explains why so often they begin with an intense life in the Spirit, only to end up fossilized… or corrupt.
Gaudete et Exsultate, 58