52 When teaching Paulinus "how to make true progress in the Bible," he says: "Everything we read in the Sacred Books shines and glitters even in its outer shell; but the marrow of it is sweeter. If you want the kernel you must break the shell." At the same time, he insists that in searching for this deeper meaning we must proceed in due order, "lest in our search for spiritual riches we seem to despise the history as poverty-stricken." Consequently he repudiates many mystical interpretations alleged by ancient writers; for he feels that they are not sufficiently based on the literal meaning: When all these promises of which the Prophets sang are regarded not merely as empty sounds or idle tropological expressions, but as established on earth and having solid historical foundations, then, can we put on them the coping-stone of a spiritual interpretation.
Source: Spiritus Paraclitus (Vatican.va)