Adding to my selection of sayings (previously here, here and here;-) Not always very deep, but mostly quite nice.
You can’t wait for inspiration. You have to go after it with a club.
The future is here. It’s just not evenly distributed.
I try never to write more clearly than I am able to think.
There is no sense in being precise when you don’t even know what you are talking about.
If I’d listened to customers, I’d have given them a faster horse.
What everybody knows is frequently wrong.
Do not believe that it is very much of an advance to do the unnecessary three times as fast.
Notes on Disordered Matter 