What do we know about the first rank, which includes the seraphim, the cherubim, and the thrones?

The first rank is closest to God and is the most exalted. It includes three hosts: the seraphim — full of eyes and with six wings — the cherubim ; and the thrones . They are all equal in rank, their likeness to God is more perfect than any other, and they are directly united with the primal light of divinity.