唯一的限制是你给自己设下的限制。
The only limits that exist are the ones you place on yourself.
我们从地下开采的石头承载着4亿年的历史，我们只是暂时的保管者。
States are rational actors that seek to maximize their relative power in order to ensure their survival in a competitive international system.
钓鱼的人躬着身子，不是要对鱼恭恭敬敬；用虫子作为诱饵捕鼠，也不是因为喜爱老鼠。
The house should be the treasure chest of living.
他人的心是一片幽暗的森林，无论它离我们自己多近。
Mathematics is the language with which God has written the universe.