The Catechism on Suffering
III. THE CHURCH IS THE TEMPLE OF THE HOLY SPIRIT
798 The Holy Spirit is "the principle of every vital and truly saving action in each part of the Body."247 He works in many ways to build up the whole Body in charity:248 by God's Word "which is able to build you up";249 by Baptism, through which he forms Christ's Body;250 by the sacraments, which give growth and healing to Christ's members; by "the grace of the apostles, which holds first place among his gifts";251 by the virtues, which make us act according to what is good; finally, by the many special graces (called "charisms"), by which he makes the faithful "fit and ready to undertake various tasks and offices for the renewal and building up of the Church."252