Paul in his letter to the Corinthians is quoting Isaiah 49:8 and applying it to his ministry:
2 Cor 6:2 (For he saith, I have heard thee in a time accepted, and in the day of salvation have I succoured thee: behold, now is the accepted time; behold, now is the day of salvation.)
Isa 49:8 Thus saith the LORD, In an acceptable time have I heard thee, and in a day of salvation have I helped thee: and I will preserve thee, and give thee for a covenant of the people, to establish the earth, to cause to inherit the desolate heritages;
Isa 49:8 (NASB) Thus says the LORD, “In a favorable time I have answered You, And in a day of salvation I have helped you; And I will keep You and give You for a covenant of the people, to restore the land, to make them inherit the desolate heritages;
In acts he also states his ministry and the apostles is in fulfillment of Isa 49:6:
Acts 13:47 For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.
Isa 49:6 And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth.
It should be noted that Isaiah's "In an acceptable time" and "in a day of salvation" is the time "to restore the land".
So if these things were happening in the days of the apostles and Paul's ministry which "land" is being restored?
It can't be argued that is physical dirt land but the spiritual land/country of Hebrews:
Heb 11:13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
Heb 11:14 For they that say such things declare plainly that they seek a country.
Heb 11:15 And truly, if they had been mindful of that country from whence they came out, they might have had opportunity to have returned.
Heb 11:16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.
While most translations translate the Greek "patris" as country - it is better understood as land or father land:
------------------------------------------------------------------------
Strongs
G3968 patris pat-rece'
from G3902;
a father-land, i.e. native town; (figuratively) heavenly home.
KJV: (own) country.
------------------------------------------------------------------------
When we parallel this with Christ's statement regarding John the Baptist is surely all fits:
Mat 17:11 And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
Mat 17:12 But I say unto you, That Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
The restoration of all things included the "land" and continued under Paul's and the apostles ministty
2 Cor 6:2 (For he saith, I have heard thee in a time accepted, and in the day of salvation have I succoured thee: behold, now is the accepted time; behold, now is the day of salvation.)
Isa 49:8 Thus saith the LORD, In an acceptable time have I heard thee, and in a day of salvation have I helped thee: and I will preserve thee, and give thee for a covenant of the people, to establish the earth, to cause to inherit the desolate heritages;
Isa 49:8 (NASB) Thus says the LORD, “In a favorable time I have answered You, And in a day of salvation I have helped you; And I will keep You and give You for a covenant of the people, to restore the land, to make them inherit the desolate heritages;
In acts he also states his ministry and the apostles is in fulfillment of Isa 49:6:
Acts 13:47 For so hath the Lord commanded us, saying, I have set thee to be a light of the Gentiles, that thou shouldest be for salvation unto the ends of the earth.
Isa 49:6 And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth.
It should be noted that Isaiah's "In an acceptable time" and "in a day of salvation" is the time "to restore the land".
So if these things were happening in the days of the apostles and Paul's ministry which "land" is being restored?
It can't be argued that is physical dirt land but the spiritual land/country of Hebrews:
Heb 11:13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
Heb 11:14 For they that say such things declare plainly that they seek a country.
Heb 11:15 And truly, if they had been mindful of that country from whence they came out, they might have had opportunity to have returned.
Heb 11:16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.
While most translations translate the Greek "patris" as country - it is better understood as land or father land:
------------------------------------------------------------------------
Strongs
G3968 patris pat-rece'
from G3902;
a father-land, i.e. native town; (figuratively) heavenly home.
KJV: (own) country.
------------------------------------------------------------------------
When we parallel this with Christ's statement regarding John the Baptist is surely all fits:
Mat 17:11 And Jesus answered and said unto them, Elias truly shall first come, and restore all things.
Mat 17:12 But I say unto you, That Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
The restoration of all things included the "land" and continued under Paul's and the apostles ministty