[The Lord] will sustain you to the end, guiltless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of his Son, Jesus Christ our Lord. (1 Corinthians 1:8–9)
What are you depending on to ensure that your faith will last until Jesus comes?
The question is not, Do you believe in eternal security? The question is, How are we kept secure?
Does the perseverance of our faith rest decisively on the reliability of our own resolve? Or does it rest decisively on the work of God to “keep us trusting”?
It is a great and wonderful truth of Scripture that God is faithful and will keep forever those whom he has called. Our confidence that we are eternally secure is a confidence that God will do whatever is necessary to “keep us trusting!”
The certainty of eternity is no greater than the certainty God will keep us trusting now. But that certainty is very great for all whom God has called.
At least three passages put the call of God and the keeping of God together in this way.
“[The Lord] will sustain you (keep you) to the end, guiltless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of his Son, Jesus Christ our Lord” (1 Corinthians 1:8–9).
“May the God of peace himself sanctify you completely, and may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ. He who calls you is faithful; he will surely do it” (1 Thessalonians 5:23–24).
“Jude, a servant of Jesus Christ and brother of James, to those who are called, beloved in God the Father and kept for Jesus Christ: May mercy, peace, and love be multiplied to you” (Jude 1–2). (See the same reality in Romans 8:30, Philippians 1:6, 1 Peter 1:5, and Jude 24.)
The “faithfulness” of God guarantees that he will keep safe forever all whom he has called.