Strictly speaking, there is no such thing as “enlightenment.” In our ignorance, we use the word when we are engaged in discussions around the subject, but it is only for the sake of using suitable vocabulary to fit the conversation. Enlightenment is nothing more than the realisation that we are already enlightened, we always were and we always will be. When we are slaves to the ego, we are either completely unconscious, or we have the knowledge that we are consciousness/spirit currently occupying a body, but at the same time we believe that we are on a “spiritual journey” in order to become what we call “enlightened.” You cannot become what you already are.
The genuinely enlightened souls who walk among us would never, ever make the statement, “I am enlightened” because to speak of enlightenment only affirms the existence of the state of being unenlightened, in other words it is an example of dualism expressed by one who is immersed in the illusion of duality (ego). In consciousness, there is only consciousness and nothing else; this is ultimate reality, there are no “states” and there is nothing to achieve. We can say that enlightenment is the knowing, experientially, of the nature of consciousness (which is our true nature).