XXXII. Pythagoras thought that he who gave things their names, ought to be regarded not only the most intelligent, but the oldest of the wise men. We must, then, search the Scriptures accurately, since they are admitted to be expressed in parables, and from the names hunt out the thoughts which the Holy Spirit, propounding respecting things, teaches by imprinting His mind, so to speak, on the expressions; that the names used with various meanings, being made the subject of accurate investigation, may be explained, and that that which is hidden under many integuments may, being handled and learned, come to light and gleam forth. For so also lead turns white as you rub it; white lead being produced from black. So also scientific knowledge (gnosis), shedding its light and brightness on things, shows itself to be in truth the divine wisdom, the pure light, which illumines the men whose eyeball is clear, unto the sure vision and comprehension of truth.