Fides et Ratio §37

³⁷ In tracing Christianity's adoption of philosophy, one should not forget how cautiously Christians regarded other elements of the cultural world of paganism, one example of which is gnosticism. It was easy to confuse philosophy—understood as practical wisdom and an education for life—with a higher and esoteric kind of knowledge, reserved to those few who were perfect. It is surely this kind of esoteric speculation which Saint Paul has in mind when he puts the Colossians on their guard: “See to it that no-one takes you captive through philosophy and empty deceit, according to human tradition, according to the elemental spirits of the universe and not according to Christ” (2:8). The Apostle's words seem all too pertinent now if we apply them to the various kinds of esoteric superstition widespread today, even among some believers who lack a proper critical sense. Following Saint Paul, other writers of the early centuries, especially Saint Irenaeus and Tertullian, sound the alarm when confronted with a cultural perspective which sought to subordinate the truth of Revelation to the interpretation of the philosophers.