We need to know why things fails. If we want to improve our system, we need to put that information into that system into logs or something. - Joe Armstrong

I don't think a program should be bigger than possibly 128 kilobytes, possibly 64 kilobytes. It should be possible to understand that program in its entirety.

Sometimes changing one line of legacy code is incredibly difficult than totally rewriting the entire stuff.

Finally after hours of googling, I can write my program. That what's I call research. The research takes 3 hours, writing the program takes 2 minutes, for the final version. You publish the program, and you throw away the research. That's not smart. Somebody later cannot figure out how you did it because all he's see is the end result.