The capacity for knowledge of the inferior man is small and easily filled up; the intelligence of the superior man is deep and not easily satisfied.
It matters not what you learn; but when you once learn a thing, you must never give it up until you have mastered it. It matters not what you inquire into; but when you inquire into a thing, you must never give it up until you have thoroughly understood it. It matters not what you tried to think out; but when you once try to think out a thing, you must never give it up until you have got what you want. It matters not what you try to sift; but when you once try to sift out a thing, you must never give it up until you have sifted it out clearly and distinctly. It matters not what you try to carried out; but when you once try to carry out a thing, you must never give it up until you have done it thoroughly and well.
