Given enough eyeballs, all bugs are shallow (e.g., given a large enough beta-tester and co-developer base, almost every problem will be characterized quickly and the fix obvious to someone).

With enough eyes, all bugs are shallow.

To solve an interesting problem, start by finding a problem that is interesting to you.

When your language is nowhere near Turing-complete, syntactic sugar can be your friend.

A security system is only as secure as its secret. Beware of pseudo-secrets.

Linux evolved in a completely different way. From nearly the beginning, it was rather casually hacked on by huge numbers of volunteers coordinating only through the Internet.

Lisp is worth learning for the profound enlightenment experience you will have when you finally get it; that experience will make you a better programmer for the rest of your days, even if you never actually use Lisp itself a lot.