Why Four Gospels?

Diamonds are colourful and beautiful. It could be viewed from different angles, and it is uniquely beautiful form each angle. In the same way, Lord Jesus Christ is more precious than diamond or anything special or unique in this world. To comprehend Lord Jesus Christ is humanly not possible. Yet, four gospel writers: Matthew, Mark, Luke, and John try to catch a glimpse of the majesty of Lord Jesus Christ.
1) Matthew: Matthew was portraying Lord Jesus Christ as the Messiah, a descendant of David. Quoting from Old Testament texts, he writes to Hebrew or Jewish audience declaring Lord as Messiah. (Matthew 9:27; 21:9)
2) Mark: John Mark, a cousin of Barnabas, and a close associate of Peter. (Colossians 4:10) He portrayed Lord as ‘Suffering Servant.’ (Mark 10:45)
3) Luke: As a ‘Beloved physician’ had a journalistic mindset, who interviewed Mary, mother of Lord Jesus and presented genealogies. (Colossians 4:11) As a Gentile writer, he presented Lord as ‘son of man’. It is addressed as an apologetic literature to Theophilus, a person of high stature in Roman Empire. These three gospels are considered as synoptic gospels.
4) John: Apostle John presents the Lord Jesus as ‘Son of God’ emphasizing as the ‘Deity of Christ.’ John begins with Lord as Word in the creation and explains the mystery of incarnation of Glory as revealed in the integration of ‘grace and truth.’
As John writes it is impossible to comprehend everything about Lord Jesus Christ with combined all human intelligence. The purpose of gospels is: “Now Jesus did many other signs in the presence of the disciples, which are not written in this book; but these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name.” (John 20:30,31)
Do I have Eternal Life by believing in the Name of Lord Jesus Christ?