What does it mean that the world knew Him not (1 John 3:1)?

In 1 John 3:1, the apostle John celebrates the great love God shows in declaring believers to be His children: “Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not” (KJV). The second half of the verse—that the world does not know Christians because it does not know Jesus Christ—explains the experience of believers who must live out their faith amid intense persecution, deception, and darkness. Given this reality, believers should not be surprised when living out their faith is hard, because they live in a world rebelling against God.

The term “world” (kosmos in Greek) in this context points to humanity’s hostility against God and the worldwide system—or way of life—that reflects that rebellion. The verbs translated “knoweth” and “knew” (KJV) come from the Greek word ginosko. Beyond merely knowing something intellectually, this term means “to grasp or understand through personal experience.” Thus, John is saying that the world neither accepts nor acknowledges Jesus or His followers. Instead, it rejects them and, as a result, does not truly know them.

Similar teaching appears in John 1:10–11: “[Jesus] was in the world, and the world was made by him, and the world knew him not. He came unto his own, and his own received him not” (KJV). In these verses, John declares that Jesus not only made the world but also entered it as a human being (John 1:1–3, 14). Yet His creation rejected Him. The New Living Translation makes the meaning even clearer: “He came into the very world he created, but the world didn’t recognize him. He came to his own people, and even they rejected him.”

In both passages, the phrase the world knew him not expresses the idea that a rebellious worldwide system—and the people who follow its godless way of life—will fail to recognize and receive Jesus for who He truly is. Despite His presence and teachings, many people did not accept Jesus or comprehend the significance of His message. The same is true of the world today, as many who hear about Jesus fail to grasp His true identity.

In addition, John asserts that the world does not recognize believers as God’s children because it did not know Jesus. If people influenced by the fallen world fail to recognize Jesus for who He truly is, believers should not be surprised when they experience similar rejection.

When unbelievers reject Jesus, their response is more than an intellectual shortcoming. The fact that “the world knew him not” indicates that unbelievers are spiritually blind (John 12:40). The apostle Paul explains, “Satan, who is the god of this world, has blinded the minds of those who don’t believe. They are unable to see the glorious light of the Good News. They don’t understand this message about the glory of Christ, who is the exact likeness of God” (2 Corinthians 4:4, NLT; see also 2 Corinthians 3:14–15). Moreover, Paul states that the minds of unbelievers “are full of darkness; they wander far from the life God gives because they have closed their minds and hardened their hearts against him” (Ephesians 4:18; NLT).

The spiritual blindness of unbelievers is illustrated in Jesus’ teaching on parables. Those who knew Jesus had “ears to hear” and “hearts to understand” His message. But those who knew Him not were “ever hearing but never understanding.” Their eyes and hearts could not understand the truth (Matthew 13:13–15; see also 2 Timothy 3:7). Because the disciples received Jesus, they could spiritually discern that what He taught was true. The same applies to believers today who have the Holy Spirit, who guides them into all truth (John 16:13).

Therefore, when John wrote, “the world knew him not,” he was referring to people who did not follow Jesus. Instead of believing in Him and receiving Him, they reject Him. Without the Spirit of truth, they are blind rebels, living in darkness. Jesus said, “The world cannot receive him” (John 14:17). “But to all who did receive him, who believed in his name, he gave the right to become children of God” (John 1:12, ESV).