Nevertheless, buddhas are buddhas and continuously actualize Buddhahood.
The condition of Buddhahood is not something that is gained, but something that is discovered and activated; that is, the nature of delusion is illumined and your original Buddhahood is realized. Of course, this experience is only called Buddhahood to differentiate it from delusion. When you speak of a state beyond delusion you call it “Buddhahood.” However, in the absolute sense, as in Dogen’s opening lines to Genjokoan, there is nothing to be grasped (no buddhas, no ordinary beings, etc.) and in the transcendent sense, buddhas and ordinary beings always contain and include each other.
In the actual experience of Buddhahood all names and labels are meaningless; for from the perspective of oneness or emptiness, differentiation does not exist. Even “oneness” is a relative term–that is, oneness is relative and only valid in contrast to multiplicity. Therefore, when differentiation is truly dissolved so, too, is oneness or Buddhahood.