I'm looking for quotes!?

Okay! I want to cover my entire room with quotes from famous people who have changed the world... so far I've only been quoting Shakespeare's Hamlet and Taming of the Shew... but I want more I want to look and see a random quote... to help me think better in my room... can anyone tell me a site with some amazing ones or kno one... or even think of one! please help me!