10. The spiritual gift which priests receive at their ordination prepared them not for a sort of limited and narrow mission but for the widest possible and universal mission of salvation "even to the ends of the earth" (Acts 1:8), for every priestly ministry shares in the universality of the mission entrusted by Christ to his apostles. The priesthood of Christ, in which all priests really share, is necessarily intended for all peoples and all times, and it knows no limits of blood, nationality or time, since it is already mysteriously prefigured in the person of Melchisedech.59 Let priests remember, therefore, that the care of all churches must be their intimate concern. Hence, priests of such dioceses as are rich in vocations should show themselves willing and ready, with the permission of their own ordinaries (bishops), to volunteer for work in other regions, missions or endeavors which are poor in numbers of clergy.

Present norms of incardination and excardination should be so revised that, while this ancient institution still remains intact, they will better correspond to today's pastoral needs. Where a real apostolic spirit requires it, not only should a better distribution of priests be brought about but there should also be favored such particular pastoral works as are necessary in any region or nation anywhere on earth. To accomplish this purpose there should be set up international seminaries, special personal dioceses or prelatures (vicariates), and so forth, by means of which, according to their particular statutes and always saving the right of bishops, priests may be trained and incardinated for the good of the whole Church.

Priests should not be sent singly to a new field of labor, especially to one where they are not completely familiar with the language and customs; rather, after the example of the disciples of Christ,⁶⁰ they should be sent two or three together so that they may be mutually helpful to one another. Likewise, thoughtful care should be given to their spiritual life as well as their mental and bodily welfare; and, so far as is possible, the circumstances and conditions of labor should be adapted to individual needs and capabilities. At the same time it will be quite advantageous if those priests who go to work in a nation new to them not only know well the language of that place but also the psychological and social milieu peculiar to the people they go to serve, so that they may communicate with them easily, thus following the example of Paul the Apostle who could say of himself: "For when I was free of all I made myself the servant of all, that I might win over many. Among Jews I was a Jew that I might win over the Jews" (1 Cor 9:19-20).

11. The Shepherd and Bishop of our souls61 so constituted his Church that the people whom he chose and acquired by his blood⁶² would have its priests to the end of time, and that Christians would never be like sheep without a shepherd.⁶³ Recognizing Christ's desire, and at the inspiration of the Holy Spirit, the apostles considered it their duty to select men "who will be capable of teaching others" (2 Tim 2:2). This duty, then, is a part oœ the priestly mission by which every priest becomes a sharer in the care of the whole Church, lest ministers be ever lacking for the People of God on earth. Since, however, there is common cause between the captain of a ship and the sailors,⁶⁴ let all Christian people be taught that it is their duty to cooperate in one way or another, by constant prayer and other means at their disposal,⁶⁵ that the Church will always have a sufficient number of priests to carry out her divine mission. In the first place, therefore, it is the duty of priests, by the ministry of the word and by the example of their own lives, showing forth the spirit of service and the paschal joy to demonstrate to the faithful the excellence and necessity of the priesthood; then they should see to it that young men and adults whom they judge worthy of such ministry should be called by their bishops to ordination, sparing no effort or inconvenience in helping them to prepare for this call, always saving their internal and external freedom of action. In this effort, diligent and prudent spiritual direction is of the greatest value. Parents and teachers and all who are engaged in any way in the education of boys and young men should so prepare them that they will recognize the solicitude of our Lord for his flock, will consider the needs of the Church, and will be prepared to respond generously to our Lord when he calls, saying: "Here I am Lord, send me" (Is 6:8). This voice of the Lord calling, however, is never to be expected as something which in an extraordinary manner will be heard by the ears of the future priest. It is rather to be known and understood in the manner in which the will of God is daily made known to prudent Christians. These indications should be carefully noted by priests.⁶⁶

Works favoring vocations, therefore, whether diocesan or national, are highly recommended to the consideration of priests.⁶⁷ In sermons, in catechetical instructions, and written articles, priests should set forth the needs of the Church both locally and universally, putting into vivid light the nature and excellence of the priestly ministry, which consoles heavy burdens with great joys, and in which in a special way, as the Fathers of the Church point out, the greatest love of Christ can be shown.⁶⁸