What does the Bible say about the water and the blood in 1 John 5?

In 1 John 5:6, the Apostle John emphasizes both facets of Christ's work by stating that He came not by water only, but by water and blood. This refers to the significance of His incarnation (water), indicating His divine and human nature, and His sacrificial death (blood), highlighting the atonement for sin. The concept of 'double cure' is vital for understanding how Christ's work both justifies believers through His blood and sanctifies them through the Spirit's work, symbolized by water. John’s witness underscores the absolute necessity of both elements for the complete salvation of God’s elect.