As soon as we started programming, we found out to our surprise that it wasn't as easy to get programs right as we had thought. Debugging had to be discovered. I can remember the exact instant when I realized that a large part of my life from then on was going to be spent in finding mistakes in my own programs.
- Maurice Wilkes - 1949
 
Programming is like sex: one mistake and you have to support it for the rest of your life.
- Michael Sinz
 
The key to efficient development is to "make interesting new mistakes".
- Tom Love