Once Saved Always Saved?
We must persevere "to the end" (Mt. 10:22; 24:13) "in the kindness of God" (Rom. 11:22) in order to reign with Christ (2 Tim. 2:12).
Scripture mentions several cases of Christians who have fallen away through sin (e.g., 1 Tim. 5:8; Heb. 6:4-6; Jas. 5:19-20; 2 Pet. 2:20-21).
Saint Paul, who had one of the most dramatic and profound conversions in 2,000 years of Christianity, writes, "I pommel my body and subdue it, lest after preaching to others I myself should be disqualified" (1 Cor. 9:27).
Saint Paul further advises those who are already Christians to "work out your own salvation with fear and trembling" (Phil. 2:12).
Christians are called to cultivate the theological virtue of hope, which is the confident expectation of divine blessing and eternal life with God (Catechism, no. 2090).
Hope is not based on our own strength or ability to resist temptations, but on the mercy and goodness of God poured out upon us by the Holy Spirit (Catechism, no. 1817; cf. Rom. 5:5).
True believers hang in there. Period. No exceptions.
As an example, Do YOU intend to stop believing?
Good many are going to get the “I don’t know you” response and be terribly shocked.
Rock Solid: The Salvation History of the Catholic Church [Ecumenical]
Getting in Touch With Reality (good character and behavior as a ticket to Heaven)
The Early Church Fathers on Salvation Outside the Church [Catholic/Orthodox Caucus]
Extra ecclesiam - Outside the Church there is no salvation.
Is Faith Necessary for Salvation? (Part 2)
Good Will Equals Salvation? (Did the pope say non christians could be saved - part 1)
The Experience of the Salvation of Christ Today