Active Duty

In the first-responder world, knowing and doing are inseparable. To be a firefighter, you must know how to do the job. You must understand your gear, building construction, fire behavior, apparatus, hose deployment, and water flow. That knowledge is essential before you can effectively perform your duties.

But knowledge alone does not make someone a firefighter. The purpose of training is ultimately to prepare us to do the job. A firefighter who knows how to operate a hose line but never responds to a fire would have a difficult time claiming to fulfill the role of a firefighter. The work does not create the identity; the identity produces the work.

The same is true for a paramedic. Someone may know the protocols, pass the tests, and train extensively on manikins. But the knowledge and training are intended to produce the ability to care for real patients. 

Likewise, someone may graduate from a police academy, learn the laws, complete the required training, and pass every examination, yet never join a department or serve as a police officer. Knowledge and preparation are important, but they are ultimately demonstrated through action.

This distinction helps us understand the relationship between faith and works in Christianity.

Many people hear the Gospel. Some may even have a powerful emotional experience, acknowledge that Jesus existed, or claim to believe in Him. But knowing about God is not the same as knowing God. Scripture does not present saving faith as merely intellectual agreement.

When a person is truly born again by the supernatural work of the Holy Spirit, everything changes. Salvation does not merely give us a new title; it gives us a new life. We become a new creation. God gives us a new heart with new desires, and those new desires begin to shape what we think, love, and do.

As a new creation our relationship with sin changes. We no longer make peace with sin or desire to remain enslaved to it. Instead, we wage war against it (Romans 6). We begin to desire obedience, holiness, and the things of God, not because our works earn salvation, but because salvation has changed us.

But what happens when hearing the Gospel and claiming to have salvation does not produce in us a new desire and will to live for Christ? Like the first responder who has the head knowledge but never actually does the job, how are we to understand someone who claims an identity yet produces none of the work that should flow from that new identity?

The Bible gives us a clear category for this. Jesus illustrates this false identity in the parable of the sower in Matthew 13. “Some people hear the Word and initially receive it with joy, but they have no root. They endure for a while, but when trials and tribulations come, they fall away. Others hear the Word, but the cares of the world and the deceitfulness of riches choke out the Word, leaving their lives unfruitful.” (Matthew 13:20–22).

The issue is not that these people simply failed to perform enough good works to keep their salvation. The deeper issue is that there was no true root. Without being rooted in Jesus and receiving new life in Him, a person cannot produce enduring fruit.

A healthy tree produces fruit because it is alive and rooted in a life-giving source. In the same way, the believer produces spiritual fruit because he or she has been made alive in Christ. The fruit does not give the tree life; the life of the tree produces the fruit (John 15:5).

This is why Christians can confidently say that we are saved by faith alone in Christ alone. Our works do not contribute to our justification. We cannot earn God's forgiveness through obedience, morality, service, or religious activity. Salvation is a gift of grace received through faith, not something we accomplish through our performance (Ephesians 2:8–9).

But the same passage immediately tells us that we are God's workmanship, created in Christ Jesus for good works (Ephesians 2:10).

So, works are not the root of our salvation; they are the fruit of it.

As Martin Luther famously stated, “We are saved by faith alone, but the faith that saves is never alone.” Saving faith produces a changed life. Not a perfect life, and not a life without struggle, but a life that increasingly desires Christ and produces the fruit of His work in us.

This is where the distinction between justification and sanctification is essential.

We are justified, declared righteous before God, solely because of Christ's finished work, received through faith. Nothing we do can add to what Christ has accomplished for us. But the person who has been justified is also being sanctified. The Holy Spirit works in the believer, progressively conforming us to the image of Christ (2 Cor 3:18).

Therefore, the idea that someone can genuinely be saved while having absolutely no desire for Christ, no evidence of spiritual life, and no concern for obedience is inconsistent with the biblical picture of salvation. A believer may stumble. A believer may sin. A believer may go through seasons of spiritual weakness. But the new life God gives produces new desires and an ongoing work of repentance and sanctification.

Think about the career of a first responder. A firefighter, police officer, or paramedic does not complete training and then stop learning. We continue to train, complete continuing education, gain experience, and refine our skills throughout our careers. The experiences we have on the job shape us into more capable and mature first responders. 

Our continued training does not make us first responders; rather, because we are first responders, we continue to train and grow in our ability to fulfill the responsibilities of the job.

The Christian life works in a similar way.  Because we have been made alive in Christ, we pursue growth in Christ. God's will for the believer is their sanctification (1 Thessalonians 4:3) to become increasingly conformed to the image of His Son. We grow through prayer, the study of God's Word, worship, fellowship with other believers, service, obedience, and sharing the Gospel.

We do these things not to become God's children, but because, through Christ, we have been made His children.

Our obedience is not the foundation of our salvation. Christ is.

Our works are not the basis of our assurance. Christ's finished work is.

Our performance does not earn God's acceptance. Jesus has already accomplished what we could never accomplish.

Just as a first responder must not only know the job but put that knowledge into action, when the Holy Spirit gives us new life, that life does not remain inactive. It produces fruit—a life that lives, serves, and seeks to glorify God in all things. We are not Christians in name only; we are active duty.

How can I know if I am a truly active-duty Christian? 

• You can know you have been reborn if you have placed your faith alone in Jesus Christ alone.

  • Because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. For with the heart, one believes and is justified, and with the mouth one confesses and is saved. For the Scripture says, “Everyone who believes in him will not be put to shame.” (Romans 10:9-11)

• You can know you have been reborn if you bear the fruit of the Holy Spirit in your life.

  • ^“But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law.” (Galatians 5:22-23)

• You can know you have been reborn if you bear marks of a changed life.

  • ^“For you may be sure of this, that everyone who is sexually immoral or impure, or who is covetous, has no inheritance in the kingdom of Christ and God. Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience. Therefore, do not become partners with them; for at one time, you were darkness, but now you are light in the Lord. Walk as children of light” (Eph 5:5-8). 

  • “For you are all children of light, children of the day. We are not of the night or of the darkness.” (1 Thessalonians 5:5)

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