"In skating over thin ice, our safety is in our speed."
 Ralph Waldo Emerson (1803-82); U.S. essayist, poet. (来源：专业英语学习网站 http://www.EnglishCN.com)

"The only business of the head in the world is to bow a ceaseless obeisance to the heart."
 W. B. Yeats (1865-1939); Irish poet, playwright.