Salvation cannot be lost. But many presume upon God’s grace without ever recognizing their need for a Savior or putting their faith in Christ. Paul speaks a strong warning to those who assume that God has chosen them because of who they are, rather than what Christ has done for them.
Right with God: The Doctrine of Justification Sacramento, CA: March 13-25 Grand Rapids, MI: March 27-29 Greenville, SC: April 17-19 Philadelphia, PA: May 1-3
Jerry Bridges, Ligon Duncan, Michael Horton, Al Mohler, and others
"The perseverance of the saints" is perhaps better construed as the "preservation of the saints".
The idea is that those that the Lord graciously saves by granting faith (Ephesians 2:8-9) he will graciously keep by keeping them in the faith.
God's Word Today Daily Web Devotional from Dr. Boice
We are studying Paul’s second letter to the Corinthians and our study brings us to chapter 2, verse 5. From this verse through to the end of chapter 3 is a very diverse portion of the letter. If you analyze it in terms of the type of material Paul presents, you find three different things.
Miss a couple studies? You can view archives and search for recent devotionals on the God's Word Today page!
"The perseverance of the saints" is perhaps better construed as the "preservation of the saints". 
