This is a great lesson that I learned from an English teacher in high school, and it's a lesson that applies absolutely EVERYWHERE. The statement must be taken in its entirety: If you know the rules, then you are allowed to break them.<p>People try to "break the rules" without an understanding of why they were there in the first place, and it comes out as shit. This applies to art, programming, writing, basically anything creative.<p>The Baroque period had all kinds of customs that applied to music; if you take music theory you will learn all about the rules of four-part harmony, no parallel fifths, etc. But then once you learn these things and have a complete understanding of why the rules are there, you can selectively break them to great effect. You break them with the cognizance of what you're doing, you break them to make a statement, or to explore new territory, or any number of reasons. But you do it with PURPOSE, because you already understood the rules.