47 In this context, therefore, when we speak about reform we are not concerned to change things, but to preserve all the more resolutely the characteristic features which Christ has impressed on His Church. Or rather, we are concerned to restore to the Church that ideal of perfection and beauty that corresponds to its original image, and that is at the same time consistent with its necessary, normal and legitimate growth from its original, embryonic form into its present structure. No one should deceive himself into thinking that the Church which has now become a vast, magnificent, and majestic temple built to the glory of God, should be reduced to the modest proportions which it had in its earliest days, as though this minimal form were the only one that is genuine and lawful. Nor should one conceive the desire of renewing the whole structure of the Church just by taking account of the special spiritual gifts (charism) of some of its members. Some imagine that the only genuine renewal of the Church is one which is born from the ideas of a few, admittedly zealous, people who not infrequently consider themselves divinely inspired. Their vain dreams of the wrong sort of renewal could easily defile the very shape which the Church ought to have. We must love and serve the Church as it is, wisely seeking to understand its history and to discover with humility the will of God who guides and assists it, even when He permits human weakness to eclipse the splendor of its countenance and the holiness of its activity. It is precisely this holiness and splendor which we are endeavoring to discover and promote.
Source: Ecclesiam Suam (Vatican.va)