This is an extract from the Catechism regarding the layperson’s participation in “Christ’s prophetic office”:
"*904 "Christ . . . fulfills this prophetic office, not only by the hierarchy . . . but also by the laity. He accordingly both establishes them as witnesses and provides them with the sense of the faith [sensus fidei] and the grace of the word"438
To teach in order to lead others to faith is the task of every preacher and of each believer.439
905 Lay people also fulfill their prophetic mission by evangelization, “that is, the proclamation of Christ by word and the testimony of life.” For lay people, "this evangelization . . . acquires a specific property and peculiar efficacy because it is accomplished in the ordinary circumstances of the world."440
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
906 Lay people who are capable and trained may also collaborate in catechetical formation, in teaching the sacred sciences, and in use of the communications media.*"
All of us are called to be teachers of the faith in different ways - as parents, teaching it in the classroom, or teaching it through one’s acts of charity or piety. I think those who are prepared to submit to and acknowledge the authority given to the Church to interpret Scripture and to teach in accordance with this authority, will have themselves the authority to go out and teach it.