See also Non-Christian Corroboration of the New Testament Account: Josephus and Non-Christian Corroboration of the New Testament Account: Pliny the Younger. Why then do unbelievers say that there is no historical support for Jesus of Nazareth outside of the New Testament?
Of course, the New Testament gives many more details about Christ than any other extant literature from the 1st Century. This is to be expected since believers would be far more interested in the subject matter than nonbelievers. Moreover, we should remember that over half the New Testament was written by people who had initially been skeptical of Jesus’ claim to be the Messiah. I’m speaking of Paul, James, and Jude. They themselves were won over by evidence.
We are on very solid ground to trust what the New Testament documents say.