Have I posted about this before? Gumby of On the Mat.com has been writing a series called "Critical Thinking in Jiu Jitsu" that is insightful and definitely worth reading.
Gumby does a good job of breaking jiu jitsu--or, rather, the learning of jiu jitsu--into some of its most basic elements of mentorship, the supremacy of safety and position and, most recently in episode four, what could be called the value of rolling in the other person's gi from time to time ...
Critical Thinking and Jiu Jitsu, Part IV
Critical Thinking and Jiu Jitsu, Part III
Critical Thinking and Jiu Jitsu, Part II
Critical Thinking and Jiu Jitsu, Part I