The X server has to be the biggest program I've ever seen that doesn't do anything for you.
Thompson later followed up: "I now realize that X was just miles ahead in its programming style." 
You can't trust code that you did not totally create yourself. (Especially code from companies that employ people like me.) No amount of source-level verification or scrutiny will protect you from using untrusted code.Kenneth Thompson
It does everything Unix does only less reliably.Kenneth Thompson
I think the open software movement (and Linux in particular) is laudable.Kenneth Thompson
I do believe that in a race, it is naive to think Linux has a hope of making a dent against Microsoft starting from way behind with a fraction of the resources and amateur labor. (I feel the same about Unix.)Kenneth Thompson
I must say the Linux community is a lot nicer than the Unix community. A negative comment on Unix would warrent death threats. With Linux, it is like stirring up a nest of butterflies.Kenneth Thompson