In John there is a mixture of long meditational discourses on definite themes and concrete events recalling the structure of Matthew (with events plus discourses); and, although the source problem is complex and research is still grappling with it, there can be little doubt that John depended on a distinct source for his seven miracles (the sign [or sēmeia] source): (1) turning water to wine at the marriage at Cana; (2) the healing of an official’s son; (3) the healing of a paralytic at the pool at Bethzatha; (4) the feeding of the multitude; (5) Jesus walking on water; (6) the cure of one blind from birth; and (7) the raising of Lazarus from the dead. In chapter 20, verse 30, the purpose of the signs is stated: “Jesus did many other signs in the presence of the disciples, which are not written in this book; 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.”

A major part of John is in the form of self-revelatory discourses by Jesus. Some would assign these to a distinct source, but they may rather be the work of the author.

Jesus’ coming “hour”—the hour of his glorification—could not come about at any bidding but only according to a divine plan, and Jesus is obedient to it. The Paraclete is promised to come to the disciples, and it is necessary that Jesus go away in order that the Paraclete may come to the church. In John, Christ is depicted as belonging to a higher world, and his kingship is not of this world. He is said to have come into this world to his own people, and they rejected him, but this is but another example of the church’s mission having passed both historically and theologically to the Gentile milieu.

The Christology in John is heightened: though the Synoptics have Jesus speaking about the Kingdom, in John, Jesus speaks about himself. This heightened Christology can be seen in many of the “I am” sayings of Jesus (e.g., “I am the bread of life”) in the context of their discourses and accompanying signs. This type of discourse is a concentration in terms and titles of the way in which the Messiah openly reveals his identity by a striking phenomenon: in the Old Testament the association with “I am” is the revelation of the name of God in the theophany (manifestation of God) to Moses (Exodus), and this theophanic interpretation carries over in John. Jesus says “I am” with regard to his function as Messiah, as divine. These sayings are self-revelatory pronouncements: (1) bread of life, (2) light of the world, (3) door of the sheepfold, (4) good shepherd, (5) resurrection and life, (6) way, truth, and life, and (7) true vine. Such theophanic expressions are heightened in other sayings: “I and the Father are one”; “Before Abraham was, I am”; “He who has seen me has seen the Father”; and Thomas’ cry after the Resurrection “My Lord and my God.”

John 14 is a farewell speech, one of a series, before the Passion. In testament form, it is the bidding of farewell by one who is dying and giving comfort to those he loves. In John, however, the eons (ages) overlap. The significance of the farewell address, thus, is in the teaching that Jesus is God’s representative. The fact that he must go to the Father means that the eschatological era already started in Jesus’ presence as the Christ and will be intensified at his death and manifested further in the coming of the Spirit to the church. The times shift; the eschatology—here and still to come—also shifts but remains on the whole realized in John, although there is still a tension between the “already” and the “not yet.”

John’s allegorical thought is shown by his ending of the miracle of Jesus’ walking on the sea. The frightened disciples took him into their boat, “and immediately the boat was at the land.” This fits the pattern of John’s Gospel, namely that, when Jesus is with his church, the new era has already arrived, and, where Jesus is, there is the Kingdom fulfilled. Similarly, the raising of Lazarus in chapter 11 is to demonstrate that the power of the Resurrection, of the fulfilled “eschaton” (last times), is already present in Jesus as Christ now, not only in some future time. Thus, there would appear to be a “realized eschatology” in John; i.e., the last times are realized in the person and work of Jesus. The coming of the Spirit, the Paraclete, however, is still to come, so, even in this most eschatological Gospel, there is a building up, a crescendo, of glorification. In chapter 12, verse 32, Jesus is depicted as saying, “I, when I am lifted up…will draw all men to myself”—again an exaltation and glorification that points to the Cross. At the point of death on the Cross, Jesus’ words “It is finished” are interpreted to mean that part of the “eschaton” is consummated, fulfilled. After the finding of the empty tomb, there is a Resurrection appearance to the disciples. This includes the “doubting Thomas” pericope, which teaches that those who have to depend on the witness of the Gospel are at no disadvantage.

In an appended chapter, 21, there is a touching story of the Apostle Peter, who, having denied his Lord thrice, is three times asked by Jesus if he loves him. Peter affirms his knowledge that Jesus knows what love is in his heart and is given the care of the church and a prediction that he himself will be persecuted and crucified.

The numerous differences between the Synoptics and John can be summed up thus: in John eternal life is already present for the believer, while in the Synoptics there is a waiting for the Parousia for the fulfillment of eschatological expectations. This Johannine theology and piety has great similarities to the views that Paul criticizes in I Cor. 15 (see below). The contrast between Paul and John is even more striking if one accepts the most plausible theory that John as we have it includes passages (added later) by which the realized eschatology has been corrected so as to fit better into the more futuristic eschatology that was stressed in defense against the Gnostics. John 5:25–28 is such a striking correction.

The Johannine chronology also differs from the Synoptic. John starts the public ministry with the casting out of the money changers: the Synoptics have this as the last event of the earthly ministry leading to Jesus’ apprehension. The public ministry in John occupies two or three years, but the Synoptics telescope it into one. In John Jesus is crucified on 14 Nisan, the same day that the Jewish Passover lamb is sacrificed; in the Synoptics Jesus is crucified on 15 Nisan. The difference in the chronologies of the Passion between John and the Synoptics may be because of the use of a solar calendar in John and a lunar calendar in the Synoptics. Nevertheless, the actual dating is of less importance than the fact that John places the Crucifixion at the time of the Passover sacrifice to emphasize Jesus as the Paschal lamb. There is no celebration of the Last Supper in John, but the feeding of the multitude in chapter 6 gives the opportunity for a eucharistic discourse. Because Jesus is regarded as the Christ from the very beginning of John, there is no baptism story—John the Baptist bears witness to Jesus as the Lamb of God—no temptation, and no demon exorcisms. Satan is vanquished in the presence of Christ. Each of the four Gospels presents a different facet of the picture, a different theology. Although in all the Gospels there is warning about persecution and the danger of discipleship, each has the retrospective comfort of having knowledge of the risen Lord who will send the Spirit. In John, however, there is a triumphant, glorious confidence: “In the world you have tribulation; but be of good cheer, I have overcome the world.”