Every book is a quotation; and every house is a quotation out of all forests, and mines, and stone quarries; and every man is a quotation from all his ancestors.

生活对智者是一场梦，对愚者是一场游戏，对富人是一场喜剧，对穷人是一场悲剧。

Adventure should be 80 percent planning and 20 percent sheer guts.

数学的美只向更有耐心的追随者展示。