The world has been for a long time engaged in writing lives of Jesus... The library of such books has grown since then. But when we come to examine them,one startling fact confronts us: all of these books relate to a personage concerning whom there does not exist a single scrap of contemporary information -- not one! By accepted tradition he was born in the reign of Augustus,the great literary age of the nation of which he was a subject. In the Augustan age historians flourished; poets,orators,critics and travelers abounded. Yet not one mentions the name of Jesus Christ, much less any incident in his life.
-Moncure D. Conway [1832 - 1907] (Modern Thought)
It is only in comparatively modern times that the possibility was considered that Jesus does not belong to history at all.
-J.M. Robertson (Pagan Christs)
Many people-- then and now-- have assumed that these letters [of Paul] are genuine,and five of them were in fact incorporated into the New Testament as "letters of Paul." Even today,scholars dispute which are authentic and which are not. Most scholars,however,agree that Paul actually wrote only eight of the thirteen "Pauline" letters now included in the New Testament. collection: Romans,1 and 2 Corinthians,Galatians, Philippians,1 Thessalonians,and Philemon. Virtually all scholars agree that Paul himself did not write 1 or 2 Timothy or Titus-- letters written in a style different from Paul's and reflecting situations and viewpoints in a style different from those in Paul's own letters. About the authorship of Ephesias,Colossians,and 2 Thessalonians,debate continues; but the majority of scholars include these,too,among the "deutero-Pauline"--literally,secondarily Pauline-- letters."
-Elaine Pagels,Professor of Religion at Princeton University,(Adam,Eve,and the Serpent)
We know virtually nothing about the persons who wrote the gospels we call Matthew,Mark,Luke,and John.
-Elaine Pagels,Professor of Religion at Princeton University,(The Gnostic Gospels)
Some hoped to penetrate the various accounts and to discover the "historical Jesus". . . and that sorting out "authentic" material in the gospels was virtually impossible in the absence of independent evidence."
-Elaine Pagels,Professor of Religion at Princeton University
The gospels are so anonymous that their titles,all second-century guesses,are all four wrong.
There is no primary, contemporary evidence for Jesus.  No document is known to have been written by anyone who knew him. Eyewitness authorship has been attributed by church tradition to some documents, but the scholarly consensus is against those attributions.  Jesus was purportedly born in Nazareth, but recent archaeological discoveries have concluded that the town of Nazareth did not exist at the time he was to have been born. 
The earliest known references to Jesus are in letters attributed to a missionary called Paul. By scholarly consensus they were written sometime around 50 CE, give or take a few years. Their author could have known Jesus but gives no indication that he did. He instead claims to have learned nothing about him except by divine revelation. He does not identify any other source for anything he said about Jesus, and in one letter, to the Galatians, he explicitly denies having any other source. Paul states that Jesus was crucified. He does not tell us who did it or where it happened. He does not tell us anything about Jesus before his execution nothing about where he lived, when he lived, or what he did, and nothing about public opinion of the man. Paul mentions no sermons, no healings, no teachings, no exorcisms, no parables, no debates with Pharisees or Sadducees. There is an apparent reference to a meal that Jesus shared with some disciples shortly before his death, but aside from that, Paul seems to know nothing about Jesus' life before his death. Which is to say that as far as we can tell from reading Paul, Jesus had no life not in Nazareth, not in Galilee, not in Jerusalem, not anywhere in this world.