比培训员工后失去他们更糟糕的是不培训他们而留住他们。
自由民主的传播和世界经济的整合已经创造了一种情况,即大国不再愿意冒险相互开战。
Virtue is more to be feared than vice, because its excesses are not subject to the regulation of conscience.
The elegance of a proof is as important as its correctness.