So.....Bible Only Christians believe in something that’s not really in the Bible? Well, I’ll be....
Yep, it is disappointing. But the popularity of Darbyism was something of a reaction to the enlightenment. They wanted to show they could do theology as well as any other science. So weakly inferred doctrines that might well have been OK as nonbinding speculation among friends took on the status of a litmus test of Christian rationality, when biblically, the support just isn’t there. Happily, since the 70’s and 80’s, many believers who DO accept the Bible as their principal authority for doctrine have been walking this back. Keep in mind that there was a time before Nicea when Arianism was rising in the churches, until Athanasius, nearly single-handedly, beat back the tide of error by a strong appeal to Scriptural authority. Likewise now, Darbyism is a fad, and it is passing, as the light of Scripture is applied. The focus will return to where it belongs, the glory of God in Christ.