The greatest happiness is to know the source of unhappiness.

If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

译文：很幸运生在太平年代，害怕到了年老时日不多。赏析：人生短暂，生命脆弱，我们要珍惜当下的生活，过好每一天，身在福中要知福。

上天不会因人们害怕寒冷而让冬天消失，大地不会因人们厌恶险峻而停止其广大。君子不会因小人喧嚣而改变自己的品行。

Profitability and responsibility must go hand in hand.

Sometimes it’s the journey that teaches you a lot about your destination.