The soul is the ray which in order to experience life brings with it an instrument, vehicles, and those vehicles are the body and the mind. Therefore instead of 'spirit', we could just as well say the soul with its two vehicles, body and mind. Through the body it experiences outer conditions, through the mind it experiences inner conditions of life. The soul experiences two spheres, the physical and the mental sphere; the mental sphere through the mind, and the physical sphere through the body and the five senses.