“If you write a lot of programs, and you're used to squeezing them all the time, you find that it's easy to write a program that's simple. A lot of it is having a clear sense of what you want to say — writing the proof by choosing what to prove, and being clear about that. In programming, a lot of simplicity comes from knowing what matters and what doesn't matter.”

“Write what you know. That should leave you with a lot of free time.”

“The greatest lesson i have learnt from writing is that it doesn't matter what you write but your writing matters, your words need to be meaningful. Feel free to write your imagination and try to find the author hidden within you.”

“Programming in the abstract sense is what I really enjoy. I enjoy lots of different areas of it… I'm taking a great deal of enjoyment writing device drivers for Linux. I could also be having a good time writing a database manager or something because there are always interesting problems.”

“Much of my work has come from being lazy. I didn't like writing programs, and so, when I was working on the IBM 701 (an early computer), writing programs for computing missile trajectories, I started work on a programming system to make it easier to write programs.”

“So long as you write what you wish to write, that is all that matters; and whether it matters for ages or only for hours, nobody can say.”

“I'm not sure I'd want to pick the brain of any author. Some writers have a lot to say about what they write and why they write it. Others don't. I've met a lot of writers who have an awful lot to say in the bar, but whose books seem curiously empty.”

“Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it?”

“The wonderful thing about dynamic typing is it lets you express anything that is computable. And type systems don’t — type systems are typically decidable, and they restrict you to a subset. People who favor static type systems say “it’s fine, it’s good enough; all the interesting programs you want to write will work as types”. But that’s ridiculous — once you have a type system, you don’t even know what interesting programs are there.”

“We're running into a lot of new problems today because of what we emphasize in this culture. The word 'success' to the average person means earning a lot of money and having a home, two cars, children in college. Success to me is entirely different to what success is to the average person. Success is being a successful human being in terms of pursuing what you believe in. If you believe in making paintings, writing poetry, writing music. If this is what you really want, you're successful to yourself. But to be successful to your culture means to sell yourself short of what you really want.”