I've picked these from twitter in the last day or so.

"The most exciting phrase to hear in science, the one that heralds the most discoveries, is not 'Eureka!'--it's 'that's funny'" Isaac Asimov via @dearsarah

Be what you are. This is the first step toward becoming better than you are.-- Julius Charles Hare via @oncevision

I am always doing things I can't do, that's how I get to do them." Pablo Picasso, also via oncevision