“in the twinkling of an eye”

I think it’s much more likely that he was using the plain sense meaning of the phrase to describe the speed with which the rapture will occur. https://gracethrufaith.com/ask-a-bible-teacher/twinkling-eye/ In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.