17 To be sure, as St. Gregory the Great admonishes, it is not right to abandon foresight in external matters in one's anxiety for spiritual matters. Explicitly, when it is a question of defending religion or promoting the common good, the latter is not to be disregarded. A priest must be cautious not to overstep his dignity and deportment lest he seem more concerned for human than heavenly affairs. Most aptly the same Gregory the Great says, "Therefore, worldly occupations are sometimes to be tolerated out of compassion, never however to be pursued out of love; lest they, by burdening the mind of the lover, overwhelm him and make him sink under their weight from heaven into the depths."(4) We also desire that you counsel pastors to take conscientious care of church property and manage it most carefully. Where any negligence has crept in, apply the most suitable remedy.
Source: Constanti Hungarorum (Vatican.va)