3 The great question concerning the sacred celibacy of the clergy in the Church has long been before Our mind in its deep seriousness: must that grave, ennobling obligation remain today for those who have the intention of receiving major orders? Is it possible and appropriate nowadays to observe such an obligation? Has the time not come to break the bond linking celibacy with the priesthood in the Church? Could the difficult observance of it not be made optional? Would this not be a way to help the priestly ministry and facilitate ecumenical approaches? And if the golden law of sacred celibacy is to remain, what reasons are there to show that it is holy and fitting? What means are to be taken to observe it, and how can it be changed from a burden to a help for the priestly life?
Source: Sacerdotalis Caelibatus (Vatican.va)