When we call ourselves Christians, we proclaim to the world that everything about us, including our very self-identity, is found in Jesus Christ because we have denied ourselves in order to follow and obey Him. He is both our Savior and our Sovereign, and our lives center on pleasing Him. To claim the title is to say with the apostle Paul, "To live is Christ and to die is gain" (Phil. 1:21). 

A Word That Changes Everything 

Since its first appearance in Antioch, the term Christian has become the predominant label for those who follow Jesus. It is an appropriate designation because it rightly focuses on the centerpiece of our faith: Jesus Christ. Yet ironically, the word itself appears only three times in the New Testament—twice in the book of Acts and once in 1 Peter 4:16. 

In addition to the name Christian, the Bible uses a host of other terms to identify the followers of Jesus. Scripture describes us as aliens and strangers, citizens of heaven, and lights to the world. We are heirs of God and joint heirs with Christ, members of His body, sheep in His flock, ambassadors in His service, and friends around His table. We are called to compete like athletes, to fight like soldiers, to abide like branches in a vine, and even to desire His Word as newborn babies long for milk. All of these descriptions—each in its own unique way— help us understand what it means to be a Christian. 

Yet, the Bible uses one metaphor more frequently than any of these. It is a word picture you might not expect, but it is absolutely critical for understanding what it means to follow Jesus. It is the image of a slave

Time and time again throughout the pages of Scripture, believers are referred to as slaves of God and slaves of Christ.8 In fact, whereas the outside world called them "Christians," the earliest believers repeatedly referred to themselves in the New Testament as the Lord's slaves.8 For them, the two ideas were synonymous. To be a Christian was to be a slave of Christ.9

The story of the martyrs confirms that this is precisely what they meant when they declared to their persecutors, "I am a Christian." A young man named Apphianus, for example, was imprisoned and tortured by the Roman authorities. Throughout his trial, he would only reply that he was the slave of Christ.10 Though he was finally sentenced to death and drowned in the sea, his allegiance to the Lord never wavered.  

Other early martyrs responded similarly: "If they consented to amplify their reply, the perplexity of the magistrates was only the more increased, for they seemed to speak insoluble enigmas. ‘I am a slave of Caesar,' they said, ‘but a Christian who has received his liberty from Christ Himself;' or, contrariwise, ‘I am a free man, the slave of Christ;' so that it sometimes happened that it became necessary to send for the proper official (the curator civitatis) to ascertain the truth as to their civil condition."11

But what proved to be confusing to the Roman authorities made perfect sense to the martyrs of the early church.12 Their self-identity had been radically redefined by the gospel. Whether slave or free in this life, they had all been set free from sin; yet having been bought with a price, they had all become slaves of Christ. That is what it meant to be a Christian.13

The New Testament reflects this perspective, commanding believers to submit to Christ completely, and not just as hired servants or spiritual employees—but as those who belong wholly to Him. We are told to obey Him without question and follow Him without complaint. 

Jesus Christ is our Master—a fact we acknowledge every time we call Him "Lord." We are His slaves, called to humbly and wholeheartedly obey and honor Him.