Pope John Paul II
Redemptoris Missio §80
Redemptoris Missio: On the Permanent Validity of the Church's Missionary Mandate
80 As I think of this serious problem, I appeal with great confidence and affection to families and to young people. Families, especially parents, should be conscious that they ought to "offer a special contribution to the missionary cause of the Church by fostering missionary vocations among their sons and daughters." An intense prayer life, a genuine sense of service to one's neighbor and a generous participation in Church activities provide families with conditions that favor vocations among young people. When parents are ready to allow one of their children to leave for the missions, when they have sought this grace from the Lord, he will repay them, in joy, on the day that their son or daughter hears his call. I ask young people themselves to listen to Christ's words as he says to them what he once said to Simon Peter and to Andrew at the lakeside: "Follow me, and I will make you fishers of men" (Mt 4:19). May they have the courage to reply as Isaiah did: "Here am I, Lord! I am ready! Send me!" (cf. Is 6:8) They will have a wonderful life ahead of them, and they will know the genuine joy of proclaiming the "Good News" to brothers and sisters whom they will lead on the way of salvation.
Source: Redemptoris Missio (Vatican.va)