He adds to this, as if he had brought together an argument with conclusive demonstrations and consequences, the following: “And, which is still more absurd, God himself conspired against those who sat at his table, by converting them into traitors and impious men.” But how Jesus could either conspire or convert His disciples into traitors or impious men, it would be impossible for him to prove, save by means of such a deduction as any one could refute with the greatest ease.
Source: Against Celsus (New Advent)