This may be, then, one of those places where the idioms of an ancient language are not completely understood by modern translators.
As the Encyclopaedia Britannica, 14th ed., vol. 13, p. 25, puts it:
"And it is not certain that even the words Thomas addressed to Jesus (Jn. 20:28) meant what they suggest in the English Version." - (Britannica article by Rev. Charles Anderson Scott, M.A., D.D. Dunn Professor of New Testament, Theological College of the Presbyterian Church of England, Cambridge.)
And John M. Creed, as Professor of Divinity at the University of Cambridge, wrote:
“‘my Lord and my God’ (Joh.xx.28) is still not quite the same as an address to Christ as being without qualification God, and it must be balanced by the words of the risen Christ himself ... (v.17): ... ‘I ascend unto my Father and your Father, and my God and your God.’” - The Divinity of Jesus Christ, J. M. Creed, p. 123.
....
No, the context of John 20:24, 25, and 29 shows that Thomas refused to believe that Jesus had been resurrected from the dead. (See footnote for John 20:8 in The NIV Study Bible, Zondervan, 1985: “John did not say what [the disciple who saw the empty tomb of Jesus] believed, but it must have been that Jesus was resurrected.” - Also see Barclay’s The Daily Study Bible Series: The Gospel of John, Revised Edition, Vol. 2, p. 267, and pp. 275, 276.)
Certainly, being resurrected from the dead does not make you God. Other persons in the Scriptures had been resurrected from the dead before (and after) Jesus, and no one, for a moment, ever suspected them of being God! In fact, being resurrected from the dead would have been used as evidence that a person was not God, since God has always been immortal and cannot die in the first place!
Furthermore, Jesus’ statements before and after Thomas’ exclamation (“my Lord and my God!”
show not only that Jesus wanted Thomas to believe that he had been resurrected to life but that he could not possibly be God!!
Jesus’ command to Thomas to literally touch his wounds and actually see his hands proves that he meant, “See, I am the same person you saw die, but now I am alive ... be believing that I have been resurrected to life” (not, “see, these wounds prove I am God ... be believing that I am God”
.
Notice that the reason given for Thomas to “be believing” is that he can see Jesus’ hands and their wounds. Likewise, after Thomas says “My Lord and my God,” Jesus reaffirms that Thomas now believes (as did the other disciples after seeing - Jn.20:20) that Jesus has been resurrected (not that he is God) “because you have seen me”
29).
Certainly Jesus wouldn’t mean, “you believe I am God because you can see me.” Instead, this is proof that Jesus, Thomas, John, and the other disciples did not believe Jesus was equally God with the Father! How? Because John himself has made it manifestly clear that “no one [no human] has ever seen God” - 1 John 4:12, RSV. (See the SF study; also OMN 3-5.)
....This respected Bishop of Mopsuestia was a very early trinitarian and a friend of John Chrysostom and of Cyril of Alexandria. - Encyclopedia Britannica, 14th ed., Vol. 22, p. 58.
This highly-respected, very early trinitarian wrote, 1600 years ago, that Thomas’ statement at John 20:28 was “an exclamation of astonishment directed to God.” - p. 535, Vol. 3, Meyer’s Commentary on the New Testament (John), 1983, Hendrickson Publ. [2]