John 20:30-31
30 And truly Jesus did many other signs in the presence of His disciples, which are not written in this book; 31 but these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.
NKJV
[Editor's Comment: Verse 31 is the purpose the Apostle John had in writing the Book of John. The verbs in the Greek for believe and believing are in the present progressive tense. Therefore, John is saying that we are to believe and continue to believe that Jesus is the Christ the Son of God and that by believing and continuing to believe we may have eternal life in the Name of Jesus.]
30 And truly Jesus did many other signs in the presence of His disciples, which are not written in this book; 31 but these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.
NKJV
[Editor's Comment: Verse 31 is the purpose the Apostle John had in writing the Book of John. The verbs in the Greek for believe and believing are in the present progressive tense. Therefore, John is saying that we are to believe and continue to believe that Jesus is the Christ the Son of God and that by believing and continuing to believe we may have eternal life in the Name of Jesus.]