We are eternally saved by putting out trust in the shed blood of Christ.
Paul is a minister of Jesus Christ to the gentiles.
 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand;
 By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;
 And that he was buried, and that he rose again the third day according to the scriptures:— KJV, 1 Corinthians 15:1-4
And it is by Pauls gospel that we shall be eternally judged.
In the day when God shall judge the secrets of men by Jesus Christ according to my gospel. — KJV, Romans 2:16