your body is part of instrument

A few days ago it occurred to me that, I could play the piano more easily and beautifully at the same time if I focused my feel mind on feeling my entire body transformed into a part of instrument, not peripheral but critical one, close to it being assimilated into the sounds I created. Having thought about the whys, it greatly helped listening to the sounds while relaxing the muscles that should not be tense, the very basics of instrument playing, or music performance. Need to hone this sense in order to achieve ever better coordination of the whole employed.