51. No fire without smoke. 无风不起浪。

　　52. Nurture passes nature. 教养胜过天性。

　　53. One is never too old to learn. 活到老，学到老。

　　54. One swallow does not make a summer. 一燕不成夏。(一花独放不是春。)

　　55. One who has seen the ocean thinks nothing of mere rivers. 曾经沧海难为水。