No-one knows, except they know themselves. The words are not the state of enlightenment, but only sounds made by speaking.Who knows what samadhi or nirvana is? What does either have to do with reason and/or intellect, or emotion. Is self-awareness a philosophy or a science?
Speaking is not requirement of enlightened mind. The Buddha decided to speak only because he considered that discussing enlightenment was something he, being enlightened, was able to do. He had not lost his reason or voice, he saw that speech was an ability, no more or less, and conveying his inner self, now revealed completely to his intellect, was his humble duty. This is embodiment of abode of bodisahtva, saht is the true nature, bodi is the tree that sustains it, it has roots that reach down eternally.