9Cf. ibid.; cf. also Second Vatican Ecumenical Council, Decree of Priestly Formation Optatam
totius (28 October 1965), n. 11: AAS 58 (1966), 720-721; Decree on the Ministry and Life of Priests
Presbyterorum ordinis (7 December 1965), n. 3: AAS 58 (1966), 993-995; Congregation for
Catholic Education, Ratio fundamentalis institutionis sacerdotalis (19 March 1985), n. 51.
10Cf. Pastores dabo vobis, n. 17: AAS 84 (1992), 682-684.
11Paul VI, in his Encyclical Letter Sacerdotalis cælibatus, deals explicitly of this necessary capacity
of the candidate for the priesthood, in nn. 63-63: AAS 59 (1967), 682-683. In n. 64, he concludes:
“The life of the celibate priest, which engages the whole man so totally and so delicately, excludes
in fact those of insufficient physical, psychic and moral qualifications. Nor should anyone pretend
that grace supplies for the defects of nature in such a man.” Cf. also Pastores dabo vobis, n. 44:
AAS 84 (1992), 733-736.
12In the developing formation process, affective maturity takes on a particular importance; this is an
area of development that requires, today more than ever, particular attention. “In reality, we grow in
affective maturity when our hearts adhere to God. Christ needs priests who are mature, virile,
capable of cultivating an authentic spiritual paternity. For this to happen, priests need to be honest
with themselves, open with their spiritual director and trusting in divine mercy” (Benedict XVI,
Speech to priests and religious in the Cathedral of Warsaw [25 May 2006], in L'Osservatore
Romano [26-27 May 2006], p. 7). Cf. Pontifical Work for Ecclesiastical Vocations, New Vocations
for a New Europe, Final Document of the Congress on Vocations to the Priesthood and to the
Consecrated Life in Europe, Rome, 5-10 May 1997, published by the Congregations for Catholic
Education, for the Oriental Churches, for Institutes of Consecrated Life and Societies of Apostolic
Life (6 January 1998), n. 37.
13Cf. Pastores dabo vobis, n. 45a: AAS 84 (1992), 736.
14Cf. Congregation for Catholic Education, Directives concerning the Preparation of Seminary
Formators (4 November 1993), nn. 36 and 57-59; cf. especially Optatam totius, n. 5: AAS 58
(1966), 716-717.
15Pastores dabo vobis, n. 16e: AAS 84 (1992), 682.
16Sacred Congregation for Catholic Education, A Guide to Formation in Priestly Celibacy (11 April
1974), n. 38.
17Cf. Pastores dabo vobis, n. 66c: AAS 84 (1992), 773; Directives concerning the Preparation of
Seminary Formators, nn. 57-59.
18Cf. Optatam totius, n. 11: AAS 58 (1966), 720-721.
19Cf. Second Vatican Ecumenical Council, Pastoral Constitution on the Church in the Modern
World Gaudium et spes (7 December 1965), n. 10: AAS 58 (1966), 1032-1033.
20To understand these assertions better, it is opportune to refer to the following assertions of Pope
John Paul II: “Humans, therefore, carry within themselves the seed of eternal life and the vocation
to make transcendent values their own. They, however, remain internally vulnerable and
dramatically exposed to the risk of failing in their own vocation. This is due to the resistance and
difficulties which they encounter in their earthly existence. These may be found on the conscious