Computer programs are all just text. And the language you choose determines what you can say. Programming languages are what programmers think in.
Good hackers develop a habit of questioning everything.
The computer world is like an intellectual Wild West, where you can think anything you want, if you're willing to risk the consequences.
Alberti, arguably the archetype of the Renaissance Man, writes that "no art, however minor, demands less than total dedication if you want to excel in it."
If I could go back and give my thirteen year old self some advice, the main thing I'd tell him would be to stick his head up and look around.
Kids are sent off to spend six years memorizing meaningless facts in a world ruled by a caste of giants who run after an oblong brown ball, as if this were the most natural thing in the world. And if they balk at this surreal cocktail, they're called misfits.
We're up against a hard one here. The cause of this problem is the same as the cause of so many present ills: specialization. As jobs become more specialized, we have to train longer for them. Kids in pre-industrial times started working at about 14 at the latest; kids on farms, where most people lived, began far earlier. Now kids who go to college don't start working full-time till 21 or 22. With some degrees, like MDs and PhDs, you may not finish your training till 30.
I was taught in college that one ought to figure out a program completely on paper before even going near a computer. I found that I did not program this way. I found that I liked to program sitting in front of a computer, not a piece of paper. Worse still, instead of patiently writing out a complete program and assuring myself it was correct, I tended to just spew out code that was hopelessly broken, and gradually beat it into shape. Debugging, I was taught, was a kind of final pass where you caught typos and oversights. The way I worked, it seemed like programming consisted of debugging.
For a long time I felt bad about this, just as I once felt bad that I didn't hold my pencil the way they taught me to in elementary school. If I had only looked over at the other makers, the painters or the architects, I would have realized that there was a name for what I was doing: sketching. As far as I can tell, the way they taught me to program in college was all wrong. You should figure out programs as you're writing them, just as writers and painters and architects do.
Realizing this has real implications for software design. It means that a programming language should, above all, be malleable. A programming language is for thinking of programs, not for expressing programs you've already thought of. It should be a pencil, not a pen. Static typing would be a fine idea if people actually did write programs the way they taught me to in college. But that's not how any of the hackers I know write programs. We need a language that lets us scribble and smudge and smear, not a language where you have to sit with a teacup of types balanced on your knee and make polite conversation with a strict old aunt of a compiler.
You learn to paint mostly by doing it. Ditto for hacking.
Programs should be written for people to read, and only incidentally for machines to execute.
Plans are just another word for ideas on the shelf. When we thought of good ideas, we implemented them.
Someone graduating from college thinks, and is told, that he needs to get a job, as if the important thing were becoming a member of an institution. A more direct way to put it would be: you need to start doing something people want. You don't need to join a company to do that. All a company is is a group of people working together to do something people want. It's doing something people want that matters, not joining the group.
If you're in a job that feels safe, you are not going to get rich, because if there is no danger there is almost certainly no leverage.
Wealth is what people want. If you plan to get rich by creating wealth, you have to know what people want.
You get paid by doing or making something people want, and those who make more money are often simply better at doing what people want.
Programming languages are just tools, after all.
When you're writing software that only has to run on your own servers, you can use any language you want. When you're writing desktop software, there's a strong bias toward writing applications in the same language as the operating system.
There is even a saying among painters: "A painting is never finished. You just stop working on it." This idea will be familiar to anyone who has worked on software.
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