Testing shows the presence, not the absence of bugs.

How do we convince people that in programming simplicity and clarity - in short: what mathematicians call elegance - are not a dispensable luxury, but a crucial matter that decides between success and failure?

The computing scientist's main challenge is not to get confused by the complexities of his own making.

In the software business there are many enterprises for which it is not clear that science can help them; that science should try is not clear either.

Progress is possible only if we train ourselves to think about programs without thinking of them as pieces of executable code.

Testing shows the presence, not the absence of bugs.

We shall do a much better programming job, provided that we approach the task with a full appreciation of its tremendous difficulty, provided that we stick to modest and elegant programming languages, provided that we respect the intrinsic limitations of the human mind and approach the task as Very Humble Programmers.