Lots of good quotes here: http://stackoverflow.com/questions/58640/great-programming-q...

My favorites:

  Always code as if the guy who ends up maintaining your
  code will be a violent psychopath who knows where you live.

-- Rick Osborne

  I Hate Programming.
  I Hate Programming.
  I Hate Programming.
  It works!
  I Love Programming.

-- Anonymous poem