If you make a saying your signature, make sure it fits your personality. If you put a well-known saying and you don't even know what it is, then you think of yourself to highly. If you think putting saying makes you more deep, then let me show you this hole. If you think a saying makes you seem more intelligent, how about you read a book?
"Those who hide themselves in other people words other then their own, are not much better then a coward hiding himself from a bully"