[F]rom the very first, faith had been translated into certain "declarations"—some of which had been gathered from the very mouth of Jesus and others … - Henri de Lubac

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[F]rom the very first, faith had been translated into certain "declarations"—some of which had been gathered from the very mouth of Jesus and others called forth by him. The twofold reflection of Saint Paul and Saint John had soon contributed to enrich and define them. Subsequently, though it was no longer henceforth a matter of revelation, the declarations continued to multiply, following the very laws of human intelligence and under the impulse of all kinds of historical necessities. A divinely instituted authority rules their meaning and use.[…] It follows from all this that dogmatic progress, whose rectitude is guaranteed by the assistance of the Spirit which Christ promised to his Church, […] is not a progressive revelation. […] With Christ, in fact, in Christ, all has been given to us. In him we have all revelation as well as all redemption. […] Henceforth, nothing more that is in fact new is to be expected. The deposit is living, certainly it is fruitful, but it is indeed a deposit. […] No theory of "development" should ever forget this essential principle. […] In the face of a recent mentality that tends to confuse dogmatic progress with a kind of natural progress in human things, it is no less important to recall it today.<p>Besides, to consider, for an instant, only the human intellectual mechanism by which the later work of dogmatic clarification is carried out […] one should recognize that it does not differ essentially from that which gave birth to the first declarations on the lips of Peter and his companions. The structure and the natural laws of the human mind are always the same; supernatural revelation has not suppressed them. A simple "assistance", carried out by the , in order to avoid any error in definitive choices, has succeeded to the positive inspiration of the early times, whose fruits are preserved in the writings of the "New Testament". But it is indeed always a matter of "elaboration".