Prayer in the Catholic Church is "the raising of one's mind and heart to God or the requesting of good things from God." It is an act of the moral virtue of religion, which Catholic theologians identify as a part of the cardinal virtue of justice. Prayer may be expressed vocally or mentally. Vocal prayer may be spoken or sung. Mental prayer can be either meditation or contemplation. The basic forms of prayer are adoration, contrition, thanksgiving, and supplication, abbreviated as A.C.T.S. The Liturgy of the Hours of the Catholic Church is recited daily at fixed prayer times by the members of the consecrated life, the clergy and devout believers. Daily prayer In the Catholic Church, the laity are encouraged to join the prayer of the canonical hours. Clergy and members of the consecrated life are obligated to pray the daily office. Sources commonly used to pray the Liturgy of the Hours include the full four volume set of The Liturgy of the Hours, the one volume Christian Prayer book, and various apps on mobile devices. Teachings on prayer Roman Catholic teachings on the subject of prayer are contained in the Catechism, where quoting John of Damascus, prayer is defined as "… the raising of one's mind and heart to God or the requesting of good things from God". Thérèse of Lisieux describes prayer as "… a surge of the heart; it is a simple look turned toward heaven, it is a cry of recognition and of love, embracing both trial and joy." By prayer one acknowledges God's power and goodness, and one's own neediness and dependence. It is therefore an act of the virtue of religion implying the deepest reverence for God and habituating a person to look to him for everything. Prayer presupposes faith in God and hope in his goodness. By both, God, to whom one prays, moves the individual to prayer. Expressions of prayer Vocal prayer Prayer can be dinstinguished into vocal and mental. Vocal prayer is that which is made by using some approved form of words, read, sung or recited; such as the sign of the cross, the Liturgy of the Hours (Divine Office), the Angelus, grace before and after meals, etc. Mental prayer is that which is made without employing either words or formulas of any kind. Catholics are exhorted to beware of underrating the usefulness or necessity of vocal prayer. Common vocal