Mystici Corporis Christi §92

⁹² But lest we be deceived by the angel of darkness who transforms himself into an angel of light, let this be the supreme law of our love: to love the Spouse of Christ as Christ willed her to be, and as He purchased her with His blood. Hence, not only should we cherish exceedingly the Sacraments with which holy Mother Church sustains our life, the solemn ceremonies which she celebrates for our solace and our joy, the sacred chant and the liturgical rites by which she lifts our minds up to heaven, but also the sacramentals and all those exercises of piety by which she consoles the hearts of the faithful and sweetly imbues them with the Spirit of Christ. As her children, it is our duty, not only to make a return to her for her maternal goodness to us, but also to respect the authority which she has received from Christ in virtue of which she brings into captivity our understanding unto the obedience of Christ. Thus we are commanded to obey her laws and her moral precepts, even if at times they are difficult to our fallen nature; to bring our rebellious body into subjection through voluntary mortification; and at times we are warned to abstain even from harmless pleasures. Nor does it suffice to love this Mystical Body for the glory of its divine Head and for its heavenly gifts; we must love it with an effective love as it appears in this our mortal flesh - made up, that is, of weak human elements, even though at times they are little fitted to the place which they occupy in this venerable body.