As far as I am concerned, Stroustrup's greatest contributions to programmer are these three quotes, all from thre 2nd Edition of The C++ Programming Language:

"The most important single aspect of software development is to be clear about what you are trying to build."

"There are no 'cookbook' methods that can replace intelligence, experience and good taste in design and programming."

"Design and programming are human activities; forget that and all is lost."

So true, so important, and so universally applicable.