Let’s notice some advice that the apostle Paul gave to the Philippians in Philippians 2 verse:12, "Therefore, my beloved, as you have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling; {13} for it is God who works in you both to will and to do for His good pleasure."

Let’s look at this idea of "Working out your own salvation with fear and trembling."

Let’s ask a question:

Salvation is deliverance from danger or suffering. To save is to deliver or protect. The word carries the idea of victory, health, or preservation. Sometimes, the Bible uses the words saved or salvation to refer to temporal, physical deliverance, such as Paul’s deliverance from prison (Philippians 1:19).

More often, the word salvation concerns an eternal, spiritual deliverance. When Paul told the Philippian jailer what he must do to be saved, he was referring to the jailer’s eternal destiny (Acts 16:30-31). Jesus equated being saved with entering the kingdom of God (Matthew 19:24-25).

What are we saved from? In the Christian doctrine of salvation, we are saved from "wrath," that is, from God’s judgment of sin (Romans 5:9; 1 Thessalonians 5:9). Our sin has separated us from God, and the consequence of sin is death (Romans 6:23). Biblical salvation refers to our deliverance from the consequence of sin and therefore involves the removal of sin. We are saved from both the power and penalty of sin.

Who does the saving? Only God can remove sin and deliver us from sin’s penalty (2 Timothy 1:9; Titus 3:5).

How does God save? In the Christian doctrine of salvation, God has rescued us through Jesus Christ (John 3:17). Specifically, it was Jesus’ death on the cross and subsequent resurrection that achieved our salvation (Romans 5:10; Ephesians 1:7). Scripture is clear that salvation is the gracious, undeserved gift of God (Ephesians 2:5, 8) and is only available through faith in Jesus Christ (Acts 4:12).

How do we receive salvation? We are saved by faith. First, we must hear the gospel—the good news of Jesus’ death and resurrection (Ephesians 1:13). Then, we must believe—fully trust the Lord Jesus (Romans 1:16). This involves repentance, a changing of mind about sin and Christ (Acts 3:19), and calling on the name of the Lord (Romans 10:9-10, 13).

Definition of Salvation

A definition of the Christian doctrine of salvation would be "the deliverance, by the grace of God, from eternal punishment for sin that is granted to those who accept by faith God’s conditions of repentance and faith in the Lord Jesus." Salvation is available in Jesus alone (John 14:6; Acts 4:12) and is dependent on God alone for provision and assurance.

The Greek word translated "fear" in this context can equally mean "reverence" or "respect." Paul uses the same phrase in (2 Corinthians 7:15) where he refers to Titus as being encouraged by the Corinthians’ reception of him "with fear and trembling," that is, with great humility and respect for his position as a minister of the gospel of Jesus Christ. Paul himself came to the Corinthian church in "weakness and fear, and with much trembling"   (1 Corinthians 2:3), mindful of the great and awesome nature of the work in which he was engaged.

The sense in which we are to work out our salvation in fear and trembling is twofold. First, the Greek verb rendered "work out" means "to continually work to bring something to completion or fruition." We do this by actively pursuing obedience in the process of sanctification, which Paul explains further in the next chapter of Philippians. He describes himself as "straining" and "pressing on" toward the goal of Christlikeness (Philippians 3:13-14).

The "trembling" Paul experiences is the attitude Christians are to have in pursuing this goal—a healthy fear of offending God through disobedience and an awe and respect for His majesty and holiness. "Trembling" can also refer to a shaking due to weakness, but this is a weakness of higher purpose, one which brings us to a state of dependency on God. Obedience and submission to the God we revere and respect is our "reasonable service" (Romans 12:1-2) and brings great joy. Psalm 2:11 sums it up perfectly: "Serve the LORD with fear and rejoice with trembling." We work out our salvation by going to the very source of our salvation—the Word of God—wherein we renew our hearts and minds (Romans 12:1-2), coming into His presence with a spirit of reverence and awe.

In Conclusion:

"Working out your own salvation with fear and trembling" has to involve repentance. In regards to repentance, Acts 2:38 is the key scripture: "Then Peter said to them, "Repent, and let every one of you be baptized in the name of Jesus Christ for the remission of sins; and you shall receive the gift of the Holy Spirit."

"Working out your own salvation with fear and trembling" has to involve repentance, obeying God and reverencing God.