Authors:

You and your opponent are one. There is a coexisting relationship between you. You coexist with your opponent and become his complement, absorbing his attack and using his force to overcome him.

Bruce Lee (2015). “Bruce Lee Jeet Kune Do: Bruce Lee's Commentaries on the Martial Way”, p.27, Tuttle Publishing
You and your opponent are one. There is a coexisting relationship between you. You coexist with your opponent and become his complement, absorbing his attack and using his force to overcome him.