Here are a few quotes collected over the years from various sources.
For every complex problem, there is a solution that is simple, neat, and wrong.
H. L. Menken
Those who do not understand Unix are condemned to reinvent it, poorly.
Henry Spencer Usenet signature, November 1987
Never struggle to decipher subtle code three times. Once might be a one-shot
fluke, but if you find yourself having to figure it out a second time
because the first was too long ago and you've forgotten details it is time
to comment the code so that the third time will be relatively painless.
One of my most productive days was throwing away 1000 lines of code.
There are two ways of constructing a software design. One is to make it so
simple that there are obviously no deficiencies; the other is to make it so
complicated that there are no obvious deficiencies. The first method is far
C. A. R. Hoare in The Emperor's Old Clothes, CACM February 1981
Never make the same mistake once.
The most effective debugging tool is still careful thought, coupled with
judiciously placed print statements.
Brian W. Kernighan, Unix for Beginners, 1979
This is the great thing about open source software. If the old lead
developer goes insane, you can always fork it, right?
Scott Richie on eVACS, July 30, 2004
The big moment in a computer scientist's life is when you reach your 64th
birthday, because then you're one million in binary.
Donald Knuth in his October 17, 2003 Computer Musings lecture on notation.