For 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.

People's New Testament

28:20 For the hope of Israel. They knew that it was the hope of Christ and the resurrection.

I am bound with this chain. A reference to the one that bound him to the soldier.

Wesley's Notes

28:20 The hope of Israel - What Israel hopes for, namely, the Messiah and the resurrection.

Jamieson-Fausset-Brown Bible Commentary

20. For this cause . have I called for you . because . for the hope of Israel-(See on [2144]Ac 26:6, 7).

I am bound with this chain-"This cause is not so much mine as yours; it is the nation's cause; all that is dear to the heart and hope of Israel is bound up with this case of mine." From the touching allusions which the apostle makes to his chains, before Agrippa first, and here before the leading members of the Jewish community at Rome, at his first interview with them, one would gather that his great soul felt keenly his being in such a condition; and it is to this keenness of feeling, under the control of Christian principle, that we owe the noble use which he made of it in these two cases.

Matthew Henry's Concise Commentary

28:17-22 It was for the honour of Paul that those who examined his case, acquitted him. In his appeal he sought not to accuse his nation, but only to clear himself. True Christianity settles what is of common concern to all mankind, and is not built upon narrow opinions and private interests. It aims at no worldly benefit or advantage, but all its gains are spiritual and eternal. It is, and always has been, the lot of Christ's holy religion, to be every where spoken against. Look through every town and village where Christ is exalted as the only Saviour of mankind, and where the people are called to follow him in newness of life, and we see those who give themselves up to Christ, still called a sect, a party, and reproached. And this is the treatment they are sure to receive, so long as there shall continue an ungodly man upon earth.