When one loves one's art，no service seems too hard.
—O.Henry
一旦热爱艺术，什么奉献都不难。
——欧·亨利
Art is a higher type of knowledge than experience.
—Aristotle
艺术是比经验更高形态的知识。
——亚里士多德
Art may be called complete and perfect when it seems to be nature.
—Longinus
艺术接近自然时，就称得上是圆满完美了。
——龙基纳
Art is the right hand of nature.The latter has only given us being；the former has made us men.
—Schiller
