Acts 28:20
20For this cause therefore have I called for you, to see you, and to speak with you:
because that for the hope of Israel I am bound with this chain.
Paul stated as the Chosen Apostle to the Gentiles, that He was in chains for or because of the Hope of Israel !
Was this Hope a earthly kingdom for the ethnic jews ? Or was this hope, the hope of the Gospel as per
Col 1:23
If ye continue in the faith grounded and settled, and be not moved away from
the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a minister;
Paul was in bonds or chains in
Acts 20:21-25 for this:
21Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.
22And now, behold, I go bound in the spirit unto Jerusalem, not knowing the things that shall befall me there:
23Save that the Holy Ghost witnesseth in every city,
saying that bonds and afflictions abide me.
24But none of these things move me, neither count I my life dear unto myself, so that I might finish my course with joy, and the ministry, which I have received of the Lord Jesus,
to testify the gospel of the grace of God.
25And now, behold, I know that ye all, among whom I have gone preaching the kingdom of God, shall see my face no more.
No doubt the bonds He was yet in acts 28:20 are for the same cause spoken here in Acts 20 24-25 Preaching the Gospel of the Grace of God and Preaching the Kingdom of God.
If we look back to chpt 26 when paul spake unto King Agrippa, we see as paul understood the scriptures [being now converted and taught of God and no longer in His former ignorance
Phil 3:4-8] The Hope of the promise of God made to the Fathers [Abraham, Isaac, and Jacob] unto which promise all the Twelve Tribes [The Church of God or The Israel of God] hope to come, was realized in the resurrection of Jesus Christ:
Acts 26:6-8;
16-18
6And now I stand and am judged for the hope of the promise made of God, unto our fathers:
7Unto which promise our twelve tribes, instantly serving God day and night, hope to come. For which hope's sake, king Agrippa, I am accused of the Jews.
8Why should it be thought a thing incredible with you,
that God should raise the dead?
And to confirm this He [Paul] explained His encounter with the risen Lord on the damascus road, of which He was charged by Him to preach the Gospel to both Jews and Greeks vs
16But rise, and stand upon thy feet: for I have appeared unto thee for this purpose, to make thee a minister and a witness both of these things which thou hast seen, and of those things in the which I will appear unto thee;
17Delivering thee from the people, and from the Gentiles, unto whom now I send thee,
18To open their eyes, and to turn them from darkness to light, and from the power of Satan unto God, that they may receive forgiveness of sins, and inheritance among them which are sanctified by faith that is in me.
Note: This is still the hope of Israel !
In Preaching the Hope of Israel, He preached also the Kingdom of God by the Cross of Christ to both Jews and Gentiles
Acts 28:28-31
28Be it known therefore unto you, that the salvation of God
is sent unto the Gentiles, and that they will hear it.
29And when he had said these words, the Jews departed, and had great reasoning among themselves.
30And Paul dwelt two whole years in his own hired house, and received all [jew or gentile] that came in unto him,
31Preaching the kingdom of God, and teaching those things which concern
the Lord Jesus Christ, with all confidence, no man forbidding him.
So we see the Kingdom of God and the Lord Jesus Christ go hand and hand, and there is no preaching Christ without Preaching His resurrection see
1 Cor 15:3-4..
From what has been presented, the Hope of Israel is Spiritual and grounded in the Cross of Christ and His resurrection, and so thats why paul even as a apostle to the gentiles could say that God, in raising up Christ, raised a Saviour unto Israel, meaning Spiritual Israel
Acts 13:23
23 Of this man's seed hath God
according to his promise raised unto Israel a Saviour, Jesus:
This is the Hope of Israel, even the Israel of God 104