8 Faustus calls upon us to believe him, and says, The truth is, if you will believe it, that the Hebrews were in a mistake regarding both the death of Jesus and the immortality of Elias. And a little after he adds, As from the outset of His taking the likeness of man He underwent in appearance all the experiences of humanity, it was quite consistent that He should seal the dispensation by appearing to die. How can this infamous liar, who declares that Christ feigned death, expect to be believed?
Did Christ utter falsehood when He said, "It behooves the Son of man to be killed, and to rise the third day?" And do you tell us to believe what you say, as if you utter no falsehoods? In that case, Peter was more truthful than Christ when he said to Him, "Be it far from You, Lord; this shall not be unto You;" for which it was said to him, "Get behind me, Satan." This rebuke was not lost upon Peter, for, after his correction and full preparation, he preached even to his own death the truth of the death of Christ.
But if Peter deserved to be called Satan for thinking that Christ would not die, what should you be called, when you not only deny that Christ died, but assert that He feigned death? You give, as a reason for Christ's appearing to die, that He underwent in appearance all the experiences of humanity. But that He feigned all the experiences of humanity is only your opinion in opposition to the Gospel. In reality, when the evangelist says that Jesus slept, that He was hungry, that He was thirsty, that He was sorrowful, or glad, and so on—these things are all true in the senseof not being feigned, but actual experiences; only that they were undergone, not from a mere natural necessity, but in the exercise of a controlling will, and of divine power.
In the case of a man, anger, sorrow, sleeping, being hungry and thirsty, are often involuntary; in Christ they were acts of His own will. So also men are born without any act of their own will, and suffer against their will; while Christ was born and suffered by His own will. Still, the things are true; and the accurate narrative of them is intended to instruct whoever believes in Christ's gospel in the truth, not to delude him with falsehoods.
Source: Reply to Faustus the Manichaean (New Advent)