数学是概念之间关系的科学,与内容无关。
You can't love everybody, but you can be kind to everybody.
最好的纪律方式是组织生活,使其不需要纪律。
成功不是终点,失败也不是致命的:重要的是继续前进的勇气。
The most important political development of the last two centuries has been the rise of the modern state.