What does 1 Thessalonians 5:24 mean?
In this verse Paul expresses his confidence in God's ability to bring about the Thessalonians' complete holiness. God is able to "perfect" His people. When He saved us, God gave us what is called positional sanctification. This term means God set us apart from the world, to be in Christ, and to be viewed by Him as righteous (Hebrews 10:10; 1 Corinthians 6:11; 2 Corinthians 5:21). As we grow spiritually, we become increasingly holy. This process is called progressive sanctification. We lead a life that honors God. Our thought life should grow in purity (Psalm 1:1–3; Philippians 4:8), and our behavior should more and more conform to the teachings of his Word (Psalm 119:133). Ultimate sanctification refers to the completion of our holiness at the rapture, when spirit, soul, and body will be made perfect (Philippians 3:20–21; 1 John 3:2). Our sanctification will take place because, as Paul writes in 1 Thessalonians 5:24, "He who calls you is faithful; he will surely do it."In our own strength, we would fail, but God cannot fail.