This witness of life, however, is not the sole element in the apostolate; the true apostle is on the lookout for occasions of announcing Christ by word, either to unbelievers . . . or to the faithful. 441
Catechism number 934
"Among the Christian faithful by divine institution there exist in the Church sacred ministers, who are also called clerics in law, and other Christian faithful who are also called laity." In both groups there are those Christian faithful who, professing the evangelical counsels, are consecrated to God and so serve the Church's saving mission (cf. CIC, can. 207 # 1, 2).