The past is a ghost, the future a dream, and all we ever have is now.
"It is a capital mistake to theorize before one has data."
失败是有教益的。真正思考的人从失败中学到的东西和从成功中学到的一样多。
能正确指出我缺点的人,是我的好老师;能赞成又能鞭策我的人,是我的好朋友;谄媚又阿谀奉承我的人,是害我的贼寇。
In truth, the foundation of education in general is the education of the poor.