There's an apparent tension between the doctrine of progressive revelation (implying future Manifestations) and the claim that Bahá'u'lláh's revelation is the culmination — "the Most Great Revelation," the "Day of God" — with a covenant explicitly protecting the integrity of His dispensation against premature claimants for a period of at least a thousand years.
I've been working through how different Bahá'í scholars have navigated this. Shoghi Effendi's formulation in 'The World Order of Bahá'u'lláh' seems to hold both together by treating the thousand-year figure as practical rather than ontological — it's a protection of the community during the formative age, not a theological claim about the end of revelation itself. But some of the apologetic literature treats it more ontologically, which creates genuine philosophical difficulties.
I'm curious how people here think about the relationship between these two doctrines, especially in light of the philosophical accounts of revelation in the Íqán.