First of all, Pray. The reason why we must pray is certainly a big one, if Christ himself commanded us to do it. “Pray therefore the Lord of the harvest to send out labourers into his harvest” (Mt 9:38). Let this day be a public witness of faith and obedience to the Lord’s command.
So celebrate it in your cathedrals: the bishops together with the clergy, the men and women religious, the missionaries, those aspiring to the priesthood and the consecrated life, the people, the young people, many young people. Celebrate it in the parishes, communities, shrines, colleges and places where there are people who are suffering.
From every part of the world let this insistent prayer rise to heaven, to ask the Father what Christ wanted us to ask.
John Paul II
16th World Day of Prayer for Vocations (1979)