John Calvin on Acts 28:20

20. For the hope of Israel. We must understand much more under these words than Luke expresseth; as we gather out of the answer, where the Jews speak of the sect; to wit, repeating his speech, which Luke omitteth. Therefore Paul intreated of Christ, that it might plainly appear that neither the law nor the temple did profit the Jews anything without him; because the covenant of adoption is grounded in him, and the promise of salvation is in him confirmed. Neither did they doubt but that the restoring of the kingdom did depend upon the coming of the Messias; and even at that time their misery and decay did increase the hope and desire of him. Wherefore Paul saith, for good causes, that he is bound for the hope of Israel. Whereby we be also taught, that no man doth hope aright, but he which looketh unto Christ and his spiritual kingdom; for when he placeth the hope of the godly in Christ, he excludeth all other hopes.

Acts 28:21-24

21. But they said unto him, We neither received letters from Judea touching thee, neither did any of the brethren come and show us or speak any evil of thee. 22. But we will hear of thee what thou thinkest; for as concerning that sect, we know that it is spoken against everywhere. 23. And when they had appointed him a day, many came to him to his lodging; to whom he expounded and testified the kingdom of God, and persuaded them of Jesus out of the law of Moses, and out of the prophets, from morning till night. 24. And certain believed those things which were spoken, but certain believed not.