【释义】:早晨能发现昨夜的错误,今日能悔改昨日的过失。  
唯一能替代一件艺术品的,是另一件艺术品。
The artist's greatest tool is not the brush or chisel, but the mind.
Critical comments by students should be taken in a friendly spirit, accumulation of material should not stifle the student’s independence.