So, what is Enlightenment? Enlightenment is simply coming to an intuitive understanding of our true nature, the delusion of the self, the oneness of all things. When we can dwell in this experience, that is Enlightenment. In the Ch’an tradition we say that everyone is Enlightened already because this is our fundamental nature. We only don’t see it because it’s obscured by layers of delusion.
I think of Enlightenment as a transition from awareness of the self as a limited individual to awareness.