"The world is a book, and those who do not travel read only a page."
The nation that destroys its soil destroys itself.
语出西汉·桓宽《盐铁论·世务》。虽然有一片诚挚忠信的愿望，如不知道因事随机应变，那便是一条危险的，甚至会灭亡的路。
The most sublime act is to set another before you.