Acts 26:28 Then Agrippa said to Paul, “You almost persuade me to become a Christian.”
The Apostle Paul was before king Agrippa, he had given his testimony, Festus the governor had tried to shut him down accusing him of too much learning that had made him mad. Paul had gone back to declare the same message Moses and the prophets would have agreed to making known that he was not speaking of anything new. None of these were strange or unknown to king Agrippa, in fact the Apostle confirms it to him and those present in vs. 26.
These were all convincing facts through history and Torah including the big one denied, the resurrection of Christ, (1Co 15). But is the convincing all we need to declare people saved? Paul in writing to Timothy reminds him of how the scriptures prepped him for salvation, “and that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus”, (2Ti 3:15). The Scriptures does the convincing, makes one wise in preparation for saving and God does the saving through that which He has convinced with.