Matthew 馬太福音 {ma3-tai4-fu2-yin1}
Mark 馬可福音 {ma3-ke3-fu2-yin1}
Luke 路加福音 {lu4-jia1-fu2-yin1}
John 約翰福音 {yue1-han4-fu2-yin1}
The Four Gospels constitute the 1st section of the New Testament, documenting Jesus’ life on earth at the dawn of this epoch. Two of the authors, Mark and Luke, were not actually the disciples of Jesus, but of Peter and Paul, respectively.
It’s also worth noting that the Gospels were written later than Paul’s letters (Epistles) because the Disciples’ first priority was to preach the gospel instead of writing books. The Gospel was first preached orally across the Roman Empire by these witnesses of Jesus. Only after many churches were founded then came the written accounts to confirm their witnesses and lay the foundation of faith for all future believers of Christ.