The saving of flesh appears to be important in the bible. 2 John 1:7 KJV biblegateway.com For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
Matthew 24:22 And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.

As surely as the word is put into flesh and has the capability to be saved, I think the two witnesses are of the literal sense and yet to come. Revelation 11:1-6
I was given a reed like a measuring rod and was told, “Go and measure the temple of God and the altar, and count the worshipers there. 2But exclude the outer court; do not measure it, because it has been given to the Gentiles. They will trample on the holy city for 42 months. 3And I will give power to my two witnesses, and they will prophesy for 1,260 days, clothed in sackcloth.” 4These are the two olive trees and the two lampstands that stand before the Lord of the earth. 5If anyone tries to harm them, fire comes from their mouths and devours their enemies. This is how anyone who wants to harm them must die. 6These men have power to shut up the sky so that it will not rain during the time they are prophesying; and they have power to turn the waters into blood and to strike the earth with every kind of plague as often as they want.

There is an exact time of 1260 days. They will prophesy, and they are two men. It does not say who they are, but given that they represent two lampstands and olive trees, they must have power in their words that is irrefutable, and leads the deceived to the truth particularly the Jew to find Christ.