The Greek word is ὁυτως (houtōs), and it means “thus” or “in this way.” The English Standard Version has it right:
And in this way all Israel will be saved…(Romans 11:26)
The translation “so” is all right if it is so understood (in this way understood).
It always helps to understand a Greek word to check other instances in which it is used. Here are a few others:
1.* Now the birth of Jesus Christ was as follows (in this way) (Matthew 1:18 NKJV—parenthetical expression mine)*
It would have been perfect English to translate the word as “so” in the above verse:
*Now the birth of Jesus Christ was so…
- So they said to him, "In Bethlehem of Judea, for thus it is written by the prophet. (Matthew 2:5 NKJV)*
Again, notice we could have used “so”:
So they said to him, "In Bethlehem of Judea, for so it is written by the prophet.
Please note that the word “so” is used in TWO DIFFERENT senses in the sentence above.
The first “so” means something like “then.” But the second one cannot mean “then.” It means more like “in this way.”
In our verse in question, the word ὁυτως, in being translates as “so” is usually taken to mean “then.” but it doesn’t it means “in this way.”
The translators who so render it, remove the ambiguity (The translators who, in this way, render it, remove the ambiguity).
3. Now if God so clothes the grass of the field, which today is, and tomorrow is thrown into the oven, will He not much more clothe you, O you of little faith? (Matthew 6:30 NKJV)
If God in this way clothes the grass of the field…
In the verse in question, the context makes it clear:
17 But if some of the branches were broken off, and you, although a wild olive shoot, were grafted in among the others and now share in the nourishing root of the olive tree,
The olive tree represents Israel. Even under the Old Covenant, there was but a remnant of the nation who were true Israel. The rest of the “branches” were broken off the tree. Those who didn’t really follow God and obey Him, were not recognized as belonging to the holy nation which He had establised. And Paul indicates that the Gentiles who followed Messiah were grafted into this “olive tree,” that is, they became part of this true Israel.
18 do not be arrogant toward the branches. If you are, remember it is not you who support the root, but the root that supports you.
19 Then you will say, “Branches were broken off so that I might be grafted in.”
20 That is true. They were broken off because of their unbelief, but you stand fast through faith. So do not become proud, but stand in awe.
21 For if God did not spare the natural branches, neither will he spare you.
The “natural” branches were ethnic Israel who, after being removed, were no longer part of the Israel of God. Those Gentiles who were grafted in, can also be removed, unless they continue to be faithful.
22 Note then the kindness and the severity of God: severity toward those who have fallen, but God’s kindness to you, provided you continue in his kindness. Otherwise you too will be cut off.
23 And even they, if they do not continue in their unbelief, will be grafted in, for God has the power to graft them in again.
24 For if you were cut from what is by nature a wild olive tree, and grafted, contrary to nature, into a cultivated olive tree, how much more will these, the natural branches, be grafted back into their own olive tree.
25 Lest you be wise in your own conceits, I want you to understand this mystery, brothers: a partial hardening has come upon Israel, until the fullness of the Gentiles has come in.
26 And in this way all Israel will be saved…
What is this way in which all Israel will be saved? By this process of God who takes out those who don’t belong, and by bringing in others who do (Gentiles). When this process is completed, when all who were in the “olive tree” (Israel) become disciples of Christ, and all Gentiles who were outside it become disciples, thev will become part of the olive tree. Thus they all will be saved. (In this way they all will be saved).
Thus Israel was not “replaced by the Church.” Rather Israel continued without a break. By taking out the false members, and adding other true members, it continues to be purified—saved from sin—not just a part of it, but ALL of it.