天险不可升也,地险山川丘陵也。王公设险以守其国,险之时用大矣哉。
释义:天之险在于高不可升,地之险在于山川丘陵。王公设险以保卫国家,险的功用非常大。
可持续性不是一种趋势,而是生存的必需。
The most important thing is to enjoy your life—to be happy—it's all that matters.
The only thing that is truly important is the love you give and receive.