Celsus next makes certain observations of the following nature: “Again, if God, like Jupiter in the comedy, should, on awaking from a lengthened slumber, desire to rescue the human race from evil, why did He send this Spirit of which you speak into one corner (of the earth)? He ought to have breathed it alike into many bodies, and have sent them out into all the world. Now the comic poet, to cause laughter in the theatre, wrote that Jupiter, after awakening, dispatched Mercury to the Athenians and Lacedæmonians; but do not you think that you have made the Son of God more ridiculous in sending Him to the Jews?”
Observe in such language as this the irreverent character of Celsus, who, unlike a philosopher, takes the writer of a comedy, whose business is to cause laughter, and compares our God, the Creator of all things, to the being who, as represented in the play, on awaking, dispatches Mercury (on an errand)! We stated, indeed, in what precedes, that it was not as if awakening from a lengthened slumber that God sent Jesus to the human race, who has now, for good reasons, fulfilled the economy of His incarnation, but who has always conferred benefits upon the human race.
For no noble deed has ever been performed among men, where the divine Word did not visit the souls of those who were capable, although for a little time, of admitting such operations of the divine Word. Moreover, the advent of Jesus apparently to one corner (of the earth) was founded on good reasons, since it was necessary that He who was the subject of prophecy should make His appearance among those who had become acquainted with the doctrine of one God, and who perused the writings of His prophets, and who had come to know the announcement of Christ, and that He should come to them at a time when the Word was about to be diffused from one corner over the whole world.
Source: Against Celsus (New Advent)