The Apostle John the disciple whom Jesu loved (13:23; 19:26; 20:2; 21:7). John knew Jewish life well, to the hostility between Jews and Samaritans (4:9); and to Jewish customs, such as the duty of circumcision on the eight day. The Gospel of John has many touches that appear to reflect the recollections of an eyewitness-such as the house at Bathany being filled with fragrance of the broken perfume jar (12:3). Mary poured the perfume on Jesus feet and wiped it with her hair.
John’s Gospel is rather different from the other three. His witness to Jesus foes its on way, highlighting matters that in the other gospels where implied not expressed enough and underdeveloped. John’s writing style of his witness of Jesus is unique among the Gospels. His focus was on the signs of Jesus identity and mission (2:1) and on faith building topics with authority.