1 John 5:10 (KJV)

What does 1 John 5:10 mean?

1 John 5:10 says that anyone who trusts in the Son of God has an inner confirmation or assurance, but anyone who does not believe God is, in effect, calling God a liar because they refuse to accept what God has said about His Son. The verse draws a sharp line between belief and unbelief, showing that rejecting God's testimony is a serious matter.

The apostle John is writing to early Christians, encouraging them to hold firmly to their faith in Jesus as God's Son. He explains that belief is not just an outward claim but brings a real, personal certainty inside the believer. John also warns that refusing to believe God's message about Jesus is not a neutral act; it is treating God's own words as untrue.

The Greek behind 1 John 5:10

• μαρτυρία (martyria, "witness" or "testimony"): This word means more than just evidence; it refers to a strong, reliable testimony, often used in a legal sense. Here, it highlights that belief in Jesus brings a deep, trustworthy assurance within the believer.
• ψεύστης (pseustēs, "liar"): Calling someone a liar was a serious accusation. John uses this strong term to show the gravity of rejecting God's direct testimony about His Son.
• πιστεύω (pisteuō, "believeth"): This word means to trust or rely on, not just to agree intellectually. The verse stresses that real faith involves personal trust in what God has said about Jesus.

Why 1 John 5:10 matters

• 1 John 5:10 clarifies that faith is not only about accepting facts but involves a personal, inward conviction given by God.
• The verse warns that unbelief is not a minor issue; it is a direct challenge to God's truthfulness, which raises the stakes for the reader.
• This verse connects to the wider message of 1 John, which emphasizes the importance of believing in Jesus as the foundation for knowing God and having eternal life.