Testing proves a programmer’s failure. Debugging is the programmer’s vindication.
- Boris Beizer, Software testing techniques by Boris Beizer , ISBN: 0442206720
 
We did about 10,000 tests on it, and it was working fine until Monday.
- Anonymous - Spokesperson for 7-11 after Y2K-related failure of their credit card processing on 2001-01-01
 
Elegance is not a dispensable luxury but a factor that decides between success and failure.
- Edsger Dijkstra - From wikiquote.org.
 
A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable.
- Leslie Lamport
 
In my experience, one of the most significant problems in software development is assuming. If you assume a method will passed the right parameter value, the method will fail.
- Paul M. Duvall - Continuous Integration