所有财富都是劳动的产物。

You can't manage what you don't measure, and you can't improve what you don't manage.

我不是为了生活而唱歌，我是为了唱歌而生活。

【译文】 孔子在河边说：“时光如流水！日夜不停留。”

The real competition is never rivals, but users' old habits.

儿童不仅在心理上是被动的，而且像一个空花瓶，是一个有待于充满及塑造的生命。