Canons of Dort 42

Study of the Canons of Dort, 1618-1619. 5th Head of Doctrine; Article 9: The Assurance of This Preservation-
Concerning this preservation of those chosen to salvation and concerning the perseverance of true believers in faith, believers themselves can and do become assured in accordance with the measure of their faith. By this faith they firmly believe that they are and always will remain true and living members of the church, and that they have the forgiveness of sins and eternal life. Article 10: The Ground of This Assurance
Accordingly, this assurance does not derive from some private revelation beyond or outside the Word, but from faith in the promises of God which are very plentifully revealed in the Word for our comfort, from the testimony of "the Holy Spirit testifying with our spirit that we are God's children and heirs" (Rom. 8:16-17), and finally from a serious and holy pursuit of a clear conscience and of good works. If God's chosen ones in this world did not have this well-founded comfort that the victory will be theirs and this reliable guarantee of eternal glory, they would be of all people most miserable.