Wherefore instruction, which reveals hidden things, is called illumination, as it is the teacher only who uncovers the lid of the ark, contrary to what the poets say, that “Zeus stops up the jar of good things, but opens that of evil.” “For I know,” says the apostle, “that when I come to you, I shall come in the fulness of the blessing of Christ;”[800] designating the spiritual gift, and the gnostic communication, which being present he desires to impart to them present as “the fulness of Christ, according to the revelation of the mystery sealed in the ages of eternity, but now manifested by the prophetic Scriptures, according to the command of the eternal God, made known to all the nations, in order to the obedience of faith,” that is, those of the nations who believe that it is. But only to a few of them is shown what those things are which are contained in the mystery. Rightly then, Plato, in the epistles, treating of God, says: “We must speak in enigmas; that should the tablet come by any mischance on its leaves either by sea or land, he who reads may remain ignorant.” For the God of the universe, who is above all speech, all conception, all thought, can never be committed to writing, being inexpressible even by His own power. And this too Plato showed, by saying: “Considering, then, these things, take care lest some time or other you repent on account of the present things, departing in a manner unworthy. The greatest safeguard is not to write, but learn; for it is utterly impossible that what is written will not vanish.” Akin to this is what the holy Apostle Paul says, preserving the prophetic and truly ancient secret from which the teachings that were good were derived by the Greeks: “Howbeit we speak wisdom among them who are perfect; but not the wisdom of this world, or of the princes of this world, that come to nought; but we speak the wisdom of God hidden in a mystery.”[801] Then proceeding, he thus inculcates the caution against the divulging of his words to the multitude in the following terms: “And I, brethren, could not speak to you as to spiritual, but as to carnal, even to babes in Christ. I have fed you with milk, not with meat: for ye were not yet able; neither are ye now able. For ye are yet carnal.”[802]