I used to think the part about the resurrection of Jesus was probably simply made up as opposed to some people actually believing they witnessed it but then I saw what I believed to be a non-biased (I mean not biased towards religion) documentary (sorry, can't remember which one) with historical analysts that explained several reasons why that part, unlike several of the other parts of the Biblical story, is unlikely to have been simply made up!
For example, the gospels are inconsistent with each other in several areas except, if I remember hearing this correctly, when it comes to the resurrection where they are all remarkably constant. Then, if I remember this correctly, according to the gospels, the first person to have witnessed his resurrection was a woman -so what? You may ask. Well, the historical analysts explained that, in those days, women where generally not considered to be credible witnesses. So if that part was simply made up, the people that made it up would not choose to have a woman as the first witness according to the story.
I find all these facts intriguing because they surely strongly indicate that the resurrection part was not simply made up. But then that begs the question, if it was not made up and if some people actually believing they witnessed it, and, of course, putting to one side the totally absurd and stupid idea that something supernatural was involved, what really happened?
-I cannot see any other sensible answer to this question other than this: -
The Romans that crucified him probably made a freak blunder of taking him down before he was actually dead because they only assumed he must be dead because he looked dead when, in fact, he was merely in an unconscious near-death state.
He later regained consciousness alone in the tomb where they put him and got up and got out the tomb.
He then talked to some of his no-doubt astonished followers for a while (hence those followers actually honestly believed they witnessed his resurrection) but, realising that the executioners had made a blunder and fearing that they would realise this if he hang about for too long and might come back to him to finish off the crucifixion properly, he decided to run away and go into permanent hiding and was never heard of again by his followers.
I have found out that this idea is not new:
….Although with modern medicine it has become considerably less frequent, medical literature/history is repleat with instances where persons have been delcared dead, only to revive in the morgue (best-case scenario) or their coffin (bummer). ….
...isn't it entirely possible, or even probable, that the charismatic person known today as "Jesus" only passed out/lost consciousness/fainted/etc., and since Golgotha CSI wasn't around to set the record straight, he was hastily and erroniously declared dead and whisked off by (the) Disciples or whomever, that had a vested interest in seeing him survive? Perhaps they even knew he was still alive (maybe he winked at Mary) and said things like, "Yeah, he was up there (how many?) hours, and nobody has ever made it that long before, he's gotta be dead." to distract the rest of the mob that would otherwise have finished the job. (The shock of the blood loss could also have caused his body to go into a "survival" mode, slowing bodily functions such as blood circulation and respiration, allowing him to "last longer" than those malfactors.) So, everyone in the know went along with the ruse and Jesus winds up on a slab in the tomb with perhaps some frankincense and a little ventilator shaft out the back. Saturday, they all work out the Resurrection script and Sunday Jesus cops a David Copperfield/ bin Laden maneuver. ...”
-I think that is similar enough to my basic theory.