Based on a text by Chuang Tzu, a Chinese philosopher.
One day Chuang Tzu dreamed that he was a butterfly, flying with joy and pleasure. In his dream, he did not know that he was Chuang Tzu. Suddenly he woke up, and without a doubt he was himself. He thought, am I Chuang Tzu who dreamed he was a butterfly? Or a butterfly dreaming that it is Chuang Tzu?
