The best way to buy a stock is when it's cheap, and the best time to sell is when it's expensive.
有人问巴菲特预计什么时后要退休，他回答
I know of only one duty, and that is to love.
The love of a teacher is like drops of dew, which can revive even a withered soul; the love of a teacher is like a warm spring breeze, which can melt even frozen emotions.