48 Midway between these two excesses stands the Catholic practice. which. while it abhors the presumption of the first class who "puffed up like bladders with the wind of vanity" (according to the phrase of Gregory XIV in the succeeding age) "went beyond the true limits in their efforts to establish the faith by natural reason adulterating the word of God with the figments of the philosopher" (Gregor. IX, Epist. Tacti dolore cordis ad theologos Parisien, 7 Jul. 1228), so too it condemns the negligence of the second class in their excessive neglect of true investigation, and the absence of all desire in them "to draw profit from the faith for their intelligence" (In lib . ii. Epist. S. Anselmi , ep. 41.), especially when their office requires of them to defend the Catholic faith against the errors that arise on all sides.
Source: Communium Rerum (Vatican.va)