"The best children's books are the ones that make children think."
贫困并非不可避免;它是一个可以解决的问题。
凡事天下要考察有无的原则,必定是以众人的耳目所见所闻的实情以知有与无来作为标准的。
You don't manage people; you manage things. You lead people.
"The essence of mathematics lies in its freedom."