When you're dreaming, you don't know it's a dream. You might even interpret a dream in your dream - and then wake up and realize it was all a dream. Perhaps a great awakening will reveal this to be a dream as well.
ZhuangziDo not seek fame. Do not make plans. Do not be absorbed by activities. Do not think that you know. Be aware of all that is and dwell in the infinite. Wander where there is no path. Be all that heaven gave you, but act as though you have received nothing. Be empty, that is all.
Zhuangzi