What does the Bible say about the declaration of a witness?

In 1 John 1:1-4, the Apostle John writes as an eyewitness of Jesus Christ, declaring what he has personally seen, heard, and even touched. This represents the essence of being a witness: to communicate personal knowledge and testimony about Jesus as the Word of Life. John's declaration is not merely informational but rooted in true fellowship with Christ, ensuring that believers may experience joy in their relationship with Him. He emphasizes that eternal life is found in knowing Jesus, not just a theoretical belief, but in a personal encounter rooted in divine revelation.