What is enlightenment and who is enlightened?

Enlightenment is a greater understanding of something important. In yoga, I think that means having a greater understanding of self, God, and the meaning of life. The enlightened are those who live in joy, regardless of circumstances. They are comfortable and confident in themselves and in the will of God. They seek to help others, pushing their own needs aside. I’d say that clearly Jesus Christ was enlightened. All the rest of us who strive for enlightenment are getting closer and closer to that perfection.
Who do you think is enlightened?