If a pretribulation rapture is true, why wasn't it a core belief and teaching of first century believers, rather than its first mention made by John Nelson Darby, and susequently presented in the Scofield Reference Bible in the early 1900's?
Comment:
If you are speaking of II Thess 4:13-18, note it does not say anything about taking us into heaven. Jesus is shown descending, not ascending. Note several...


