But since he has represented those whom he regards as worms, viz., the Christians, as saying that “God, having abandoned the heavenly regions, and despising this great earth, takes up His abode among us alone, and to us alone makes His announcements, and ceases not His messages and inquiries as to how we may become His associates for ever,” we have to answer that he attributes to us words which we never uttered, seeing we both read and know that God loves all existing things, and loathes nothing which He has made, for He would not have created anything in hatred.
We have, moreover, read the declaration: “And You spare all things, because they are Yours, O lover of souls. For Your incorruptible Spirit is in all. And therefore those also who have fallen away for a little time You rebuke, and admonish, reminding them of their sins.” How can we assert that “God, leaving the regions of heaven, and the whole world, and despising this great earth, takes up His abode among us only,” when we have found that all thoughtful persons must say in their prayers, that “the earth is full of the mercy of the Lord,” and that “the mercy of the Lord is upon all flesh;” and that God, being good, “makes His sun to arise upon the evil and the good, and sends His rain upon the just and the unjust;” and that He encourages us to a similar course of action, in order that we may become His sons, and teaches us to extend the benefits which we enjoy, so far as in our power, to all men?
For He Himself is said to be the Saviour of all men, especially of them that believe; and His Christ to be the “propitiation for our sins, and not for ours only, but also for the sins of the whole world.” And this, then, is our answer to the allegations of Celsus. Certain other statements, in keeping with the character of the Jews, might be made by some of that nation, but certainly not by the Christians, who have been taught that “God commends His love towards us, in that, while we were yet sinners, Christ died for us;” and although “scarcely for a righteous man will one die, yet perhaps for a good man some would even dare to die.” But now is Jesus declared to have come for the sake of sinners in all parts of the world (that they may forsake their sin, and entrust themselves to God), being called also, agreeably to an ancient custom of these Scriptures, the “Christ of God.”
Source: Against Celsus (New Advent)