Christ hadn't resurrected yet. How many rose from the graves ? What was their physical appearance ? How many witnessed it ? How many other miracles had Jerusalem already seen ? How many other strange events had Jerusalem been previously exposed to ? People (natural appearance ? ) wandering in an unnatural darkness during a quake strong enough to open graves claiming to have come from those graves may have fallen on many deaf distracted ears ? .. Do I believe it happened ? Yes. Besides the Bible do I need proof ? No. Why do you ?
