你必须学会的一部分是如何处理错误和改变胜算的新事实。生活在某种程度上就像一场扑克游戏，当你拿着一手心爱的牌时，有时必须学会放弃。
安全不仅仅是一项政策，它是一种生活方式。
Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
你无法前瞻性地连接这些点；你只能回顾性地连接它们。
The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart.
The masses have no capacity for understanding complex issues.
