That which is, suchness, can through an apparent individual state, "there is enlightenment. There is understanding." But the sage will not say, "I am enlightened." Others may call that person a guru, an enlightened being, but that apparent individual will not have any sense of "I am enlightened." For the sage there is no individual left.
Anyone who truly understands no longer has a belief in himself as a separate person. The understanding wipes that slate clean. Thus the sage speaks, eats and sleeps, and apparently has likes and dislikes, but he himself, no longer has a sense that any individual remains.
Words will come from an apparently separate body, a seeming particular mouth, but there will be no separate person speaking. Actions will happen but they will belong to no one. Awarenss appearing as consciousness is all. Understanding is all. None other.
It appears a paradox to those remaining in ignorance. But close examination is required. The same lack of center that you can't find in yourself is that same no thingness that is all there is. If you do it well, you too, can be nobody, and All there is.