Wu Cheng'en. On the second journey to the West, Wu Cheng'en: Wukong said: This is difficult! But it's hard! The founder said: nothing is difficult in the world, I am afraid that there is a will. Wukong listened and kowtowed.

Nothing is difficult in the world, if you put your mind to it: Wukong, The Journey to the West, the second time: Wukong said: This is difficult! But it's hard! The founder said: nothing is difficult in the world, I am afraid that there is a will. Wukong listened and kowtowed.