Vatican II's Optatam Totius #2

The duty of fostering vocations pertains to the whole Christian community, which should exercise it above all by a fully Christian life. The principal contributors to this are the families which, animated by the spirit of faith and love and by the sense of duty, become a kind of initial seminary, and the parishes in whose rich life the young people take part. Teachers and all those who are in any way in charge of the training of boys and young men, especially Catholic associations, should carefully guide the young people entrusted to them so that these will recognize and freely accept a divine vocation. All priests especially are to manifest an apostolic zeal in fostering vocations and are to attract the interest of youths to the priesthood by their own life lived in a humble and industrious manner and in a happy spirit as well as by mutual priestly charity and fraternal sharing of labor.