"I think a lot of people may take some heart from this: a lot of the math, the heavy math in projective geometry, took me a long time. There were many many years, a decade, when I was considered this graphics guru genius, when I really couldn't do from scratch the mathematics that underpins a lot of that. But slowly, eventually, with a couple decades of experience, most of it did eventually sink in on me."

“The biggest problem is that Java is really slow. On a pure cpu / memory / display / communications level, most modern cell phones should be considerably better gaming platforms than a Game Boy Advanced. With Java, on most phones you are left with about the CPU power of an original 4.77 mhz IBM PC, and lousy control over everything.”

“The idea that I can be presented with a problem, set out to logically solve it with the tools at hand, and wind up with a program that could not be legally used because someone else followed the same logical steps some years ago and filed for a patent on it is horrifying.”

“When he was young, John Romero made a game for every letter of the alphabet. That was wise.”

“In the information age, the barriers just aren't there. The barriers are self imposed. If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on, and the dedication to go through with it. We slept on floors. We waded across rivers.”

“It's a good thing Doom 3 is selling very well...”

“Helping people directly can be a noble thing. Forcing other people to do it with great inefficiency? Not so much. There isn’t a single thing that I would petition the federal government to add to its task list, and I would ask that it stop doing the majority of the things that it is currently doing. My vote is going to the candidates that at least vector in that direction.”