In Paul's last account, as in Joseph Smith's later First Vision accounts, the emphasis is no longer on his status before the Lord, but on the big picture of his mission in taking the Gospel to the world. In Acts 26, verses 16-18 reveal that the Lord told Paul he had a mission as a witness to take the Gospel to many, including the nations of the Gentiles, that many might be turned to God and gain forgiveness. These words to Paul from the Lord represent important information that was not presented before. With that mission in mind, Paul speaks boldly to King Agrippa:
19 Whereupon, O king Agrippa, I was not disobedient unto the heavenly vision:Paul was focused on preaching nothing but Christ, the Messiah prophesied by the ancient prophets and witnessed by living apostles and disciples in Paul's day. And this message of Paul about the grace of Jesus Christ, the Messiah, was this: that men should "repent and turn to God, and do works meet for repentance" (v. 20). That has been the message of God's prophets throughout history. It was a key message of Christ, it was a key message of Paul, and it is a key message of The Church of Jesus Christ of Latter-day Saints. Neither Paul nor we LDS folks mean that these "works meet for repentance" save you or earn your salvation, but they are part of what we need to do to really follow Jesus Christ and fully develop our faith in Him. It's the kind of message that can get you branded as non-Christian in some quarters, but it's core to true Christianity.
20 But shewed first unto them of Damascus, and at Jerusalem, and throughout all the coasts of Judaea, and then to the Gentiles, that they should repent and turn to God, and do works meet for repentance.
21 For these causes the Jews caught me in the temple, and went about to kill me.
22 Having therefore obtained help of God, I continue unto this day, witnessing both to small and great, saying none other things than those which the prophets and Moses did say should come:
23 That Christ should suffer, and that he should be the first that should rise from the dead, and should shew light unto the people, and to the Gentiles.
So let's all strive to exercise faith in Christ by repenting of our sins, calling upon His forgiveness, and more earnestly following Him. He gives us power to do that if we will believe Him and trust Him.