Kent Beck quotes
The new concept of Extreme Programming (XP) is gaining more and more acceptance, partially because it is controversial, but primarily because it is particularly well-suited to help the small software development team succeed... XP is controversial, many software development sacred cows don't make the cut in XP; it forces practitioners to take a fresh look at how software is developed.
Kent Beck
Refactoring (noun) : a change made to the internal structure of software to make it easier to understand and cheaper to modify without changing the observable behavior of the software.
To refactor (verb) : to restructure software by applying a series of refactorings without changing the observable behavior of the software.
Kent Beck