You still feel pain and can cry with deep sorrow when someone you love “dies,” while at the same time knowing that they were never their body. You know that you are not your body. It is a temporary, rented housing for your consciousness. You are aware that “this too shall pass.”
Nothing is left to achieve because enlightenment is not time bound. It is only in time that we feel we need to go through a lot of steps to get somewhere. The enlightened being knows that it is already there and sits back to watch the show.