Part 10 of A New Hope
Text: 1 Thessalonians 5:23-28
Now may the God of peace himself sanctify you completely, and my 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 (vv. 23-24).
We appreciate reliability (e.g., a reliable vehicle). It’s frustrating when something or someone is unreliable. (“He said he’d be here.”)
Our hope is based on God’s word (i.e., his promises). How can we be sure that Christ really will return one day? How can we be sure that God won’t let us down? The apostle Paul’s answer: because God is “faithful” (v. 24). He’s reliable. “God is completely trustworthy, not only ‘worthy’ of our ‘trust,’ but absolutely to be relied on to carry out what has been promised.”  Our hope would be uncertain if God was not faithful.
The Faithful God
In the beginning of the book of Exodus, the Israelites are slaves in Egypt. “And God heard their groaning, and God remembered his covenant with Abraham, with Isaac, and with Jacob” (Exod. 2:24). God chose Moses to lead the Israelites out of Egypt, and God revealed to Moses that his name is Yahweh (Exod. 3:14). God said to him, “This is my name forever, and thus I am to be remembered throughout all generations” (Exod. 3:15).
The name Yahweh reminds us that God keeps his promises.
After God had rescued the Israelites, Moses proclaimed to the people, “The LORD you God is God, the faithful God who keeps covenant and steadfast love with those who love him and keep his commandments, to a thousand generations” (Deut. 7:9). God’s name is still Yahweh, and he is still a covenant-keeping God.
Peace and Holiness
Verse 23 is a prayer. The prayer has two parts: (1) “may the God of peace sanctify you completely”; (2) “may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ.”  This is a prayer about holiness.
Notice that Paul calls God “the God of peace.” Peace (shalom) is wholeness (i.e., the absence of conflict—both inner conflict and conflict with others). God’s desire for us is that we be people of peace. Paul wrote in verse 13, “Be at peace among yourselves.” There’s a connection between peace and holiness. To be holy (i.e., obey God’s commands), we must love others. If there is a lack of peace with others, there is a lack of love. And if there is a lack of love, there is a lack of holiness.
Hebrews 12:14 says, “Strive for peace with everyone, and for holiness without which no one will see the Lord.”
What does Paul say God will do (“he will surely do it,” v. 24)? God will make sure that we (i.e., those of us who have put our faith in Christ) will stand “blameless” (v. 23) at the final judgment (“at the coming of our Lord Jesus Christ”).
Escaping condemnation is not the result of our own effort. It depends on the faithfulness of God. Paul wrote to the Philippians, “I am sure of this, that he who began a good work in you will bring it to completion at the day of Jesus Christ [i.e., his return]” (Phil. 1:6). However, striving for holiness is expected of every Christian and provides evidence of the Holy Spirit’s presence within us.
Without a Doubt
The other day my bathroom tap wouldn't turn off. The cartridge inside was broken. It was less than two years old. That's frustrating.
Unlike the people and things of this world, God is one hundred percent reliable. With God, there should never be a doubt that he will do what he has promised to do.
 Gordon D. Fee, The First and Second Letters to the Thessalonians, 231.
 This prayer is similar to the one found in 3:13.