Who or What, Do you bare witness to?

John 1:15-18 discusses the identity of the Word (Christ) and who He came to bring. In verse 15, He says that Jesus is the "true light which gives light to everyone." Verse 16 says that the Word (Jesus) was full of grace and truth, and verse 17 explains that the Law (Moses) was given through Him, but that grace and truth came through Jesus Christ. Finally, verse 18 states that no one has ever seen God at any time, but that Jesus Christ is the only one who has come from the Father and declared Him. The passage emphasizes the identity of Jesus as the Son of God and the one who brings grace and truth to all.