Life and death, profit and loss, failure and success, poverty and wealth, value and worthlessness, praise and blame, hunger and thirst, cold and heart — these are natural changes in the order of things. They alternate with each other like day and night. No one knows where one ends and the other begins. Therefore, they should not disturb our peace or enter into our souls. Live so that you are at ease, in harmony with the world, and full of joy. Day and night, share the springtime with all things, thus creating the season in your own heart. This is called achieving full harmony.

— Chuang Tsu by Zhuangzi, Gia-Fu Feng, Jane English (Page 103)