Pope Paul VI
Sacerdotalis Caelibatus §41
Sacerdotalis Caelibatus: On the Celibacy of the Priest
41 In any case, the Church of the West cannot weaken her faithful observance of her own tradition. Nor can she be regarded as having followed for centuries a path which instead of favoring the spiritual richness of individual souls and of the People of God, has in some way compromised it, or of having stifled, with arbitrary juridical prescriptions, the free expansion of the most profound realities of nature and of grace.
Source: Sacerdotalis Caelibatus (Vatican.va)