There have been 4 scholarly "quests" for "the historical Jesus. These quests are anchored to the criterion of dissimilarity", the principle that the Jesus sayings that have the highest claim to authenticity are those whose point is "disanalogous" to both the Judaism of the period and early church theology. The assumption here is that, with fading memories of the Jesus tradition, the early church confused and blended in the sound teaching of early Christians and the best of Judaism with what Jesus actually taught on issues that demanded (but may not have had) a known anchor in what Jesus said and did. This criterion is most useful in identifying the most certain sayings of Jesus. Why? Because if a the point of a Jesus saying is dissimilar from both the early church's teaching and the best of contemporary Jewish teaching, it is the least likely to have been invented and therefore has the highest claim to authenticity. But here's the problem: Application of the criterion tends to imply that the early church seldom used what Jesus actually taught and Jesus never echoed the best of contemporary Jewish teaching. Both implications strike me as most implausible.
With respect to Jesus' alleged miracles and resurrection, modern scholarship applies the historicist principles of causality and analogy: The principle of causality implies that in historical analysis, given a choice, a natural explanation makes the most sense. The principle of analogy teaches that the most plausible explanation of alleged miracles is that explanation which has modern analogies. Extraordinary claims require extraordinary evidence. So, for example, from this perspective it is more reasonable to assume that Romans removed Jesus' body on Saturday evening after the Sabbath than to assume that He rose bodily from the dead. After all, standard Roman practice was to remove the corpses of criminals, including the 2 thieves on crosses, and to dump them in a common hole from criminals. No Christians were present on that Saturday night to monitor what happened to Jesus' body.
This principle works well as refutation of cassationists who claim that the age or miracles ended with the age of apostles. But here's my problem with this approach: I have experienced and heard compelling testimonies of modern miracles. If God can do it today, it's reasonable to assume that He could have performed miracles back then. This fact helps us dispose of the application of the principle of analogy.