After this he continues: “These herdsmen and shepherds concluded that there was but one God, named either the Highest, or Adonai, or the Heavenly, or Sabaoth, or called by some other of those names which they delight to give this world; and they knew nothing beyond that.” And in a subsequent part of his work he says, that “It makes no difference whether the God who is over all things be called by the name of Zeus, which is current among the Greeks, or by that, e.g., which is in use among the Indians or Egyptians.”
Now, in answer to this, we have to remark that this involves a deep and mysterious subject— that, viz., respecting the nature of names: it being a question whether, as Aristotle thinks, names were bestowed by arrangement, or, as the Stoics hold, by nature; the first words being imitations of things, agreeably to which the names were formed, and in conformity with which they introduce certain principles of etymology; or whether, as Epicurus teaches (differing in this from the Stoics), names were given by nature,— the first men having uttered certain words varying with the circumstances in which they found themselves.
If, then, we shall be able to establish, in reference to the preceding statement, the nature of powerful names, some of which are used by the learned among the Egyptians, or by the Magi among the Persians, and by the Indian philosophers called Brahmans, or by the Samanæans, and others in different countries; and shall be able to make out that the so-called magic is not, as the followers of Epicurus and Aristotle suppose, an altogether uncertain thing, but is, as those skilled in it prove, a consistent system, having words which are known to exceedingly few; then we say that the name Sabaoth, and Adonai, and the other names treated with so much reverence among the Hebrews, are not applicable to any ordinary created things, but belong to a secret theology which refers to the Framer of all things.
These names, accordingly, when pronounced with that attendant train of circumstances which is appropriate to their nature, are possessed of great power; and other names, again, current in the Egyptian tongue, are efficacious against certain demons who can only do certain things; and other names in the Persian language have corresponding power over other spirits; and so on in every individual nation, for different purposes. And thus it will be found that, of the various demons upon the earth, to whom different localities have been assigned, each one bears a name appropriate to the several dialects of place and country.
He, therefore, who has a nobler idea, however small, of these matters, will be careful not to apply differing names to different things; lest he should resemble those who mistakenly apply the name of God to lifeless matter, or who drag down the title of “the Good” from the First Cause, or from virtue and excellence, and apply it to blind Plutus, and to a healthy and well-proportioned mixture of flesh and blood and bones, or to what is considered to be noble birth.
Source: Against Celsus (New Advent)