With regard to the fourth aspect of our physical existence, man wrongly identifies himself with the physical body, calling it "myself." And when the physical body is in pain he says, "I am ill", because he identifies himself with something which belongs to him but which is not himself. The first thing to learn in the spiritual path is to recognize the physical body not as one's self, but as an instrument, a vehicle, through which to experience life. This instrument is so equipped that one may be able to experience all that is worth experiencing outside oneself, and also all that is worth experiencing within oneself.