1. The mind frame of studying many styles of martial arts, knowledge, spirituality, and religions. However, instead of blindly accepting all limitations of what one is studying, taking the parts that are needed, and disregarding the rest.
2. This concept was mainstreamed by Bruce Lee, who studied many types of Martial Arts. Today this concept has been further mainstreamed by MMA and UFC, which focus more on the martial arts. Bruce Lee also took a philosophical approach to the discipline as well.