The apostle Paul was one who was fully persuaded to believe the Gospel. Since Paul met the Lord Jesus on the Damascus road he never was the same again. He had a hope that no man could ever take away from him. This same hope found only in Jesus Christ is available for mankind today. You can be fully persuaded as to your Salvation if you receive Christ as Saviour and Lord.
Bible Scriptures: Darby Translation
Acts 26:28- 29 “28 And Agrippa [said] to Paul, In a little thou persuadest me to become a Christian.29 And Paul [said], I would to God, both in little and in much, that not only thou, but all who have heard me this day, should become such as *I* also am, except these bonds.“
Romans 4:18-22 “who against hope believed in hope to his becoming father of many nations, according to that which was spoken, So shall thy seed be:19 and not being weak in faith, he considered not his own body already become dead, being about a hundred years old, and the deadening of Sarah’s womb,
20 and hesitated not at the promise of God through unbelief; but found strength in faith, giving glory to God;21 and being fully persuaded that what he has promised he is able also to do;22 wherefore also it was reckoned to him as righteousness.”
Romans 8:38-39 “For I am persuaded that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers,39 nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which [is] in Christ Jesus our Lord.”
2 Timothy 1:12 “ For which cause also I suffer these things; but I am not ashamed; for I know whom I have believed, and am persuaded that he is able to keep for that day the deposit I have entrusted to him.”