31、不怕铁硬，只怕心坚。
Not afraid of iron, but afraid of heart.
32、一个人做事如果没有恒心，必将一事无成。
If a person does not persevere in doing things, he will achieve nothing.
33、无专精则不能成，无涉猎则不能通也。
No mastery, no hunting.
