Someone could claim he wasn't in his divine nature when he said it? He was in his human nature at that moment?
I think Baha'i claim that about other prophets, specifically Moses.
The Bible shows how they are born with that Holy Spirit, that they are not men like us, though they share our humanity, they are born of the Holy Spirit.
Baha'u'llah has offered that even the Holy Spirit is created of the Most Great Spirit G_d.
As such the wisdom is shown by them and seen by them from birth.
You will note in scripture, that there is a time that God is revealed from them. Moses was the Burning Bush, Muhammad was the Angel Gabriel, the Bab was the severed head of Immam Ali and Baha'u'llah was the Maiden in 1852 and Jesus was the Dove at baptism with John the Baptist, who was also Eiljah!
Also interesting is that both the Bab and Baha'u'llah have identified as being the Ones who conversed with Moses. So I am still meditating on this, it would appear the Messengers might send themselves! They are all the first and the last, the beginning and the end, all the same Spirit given in a different age and a different name.
Regards Tony