I’m reading a book called: Zen Lessons, The Art of Leadership translated by Thomas Cleary. Here is lesson #56:

Zhenjing said to the king of Shu:
In your daily activities, vigorously carry out whatever is right and put a firm stop to whatever is wrong. You should not change your will on account of difficulty or ease. If because of today’s difficulty you shake your head and pay no heed, how can you know that another day it will not be as hard as today?

diary of Li Shanglao