While matter on the spiritual plane quite automatically obeys the being's own spiritual impulses of energy, it is quite another thing with physical matter. It does not automatically obey the being's spiritual impulses of thought or energy. It can be mastered only by means of borrowed physical forces. But in order to be able to work or juggle with physical matter, the living being must have an appropriate physical instrument. We know this instrument in the form of the physical organism of the being concerned. This organism is therefore equipped with sensory organs, which are in turn really only electrical transmitters of physical impulses to the being's spiritual organism, just as it also serves as an instrument for the being's transmission of spiritual impulses to the physical plane. The being has thus, as previously mentioned, the ability to experience and create in two worlds, namely, the physical world and the spiritual one, even if it is actually stationary only in the latter, and only indirectly experiences the former. While the spiritual structure is the being's primary and uninterrupted instrument for experiencing life, the physical body is intended only as a temporary instrument for the being's juggling with physical matter. It constitutes a temporary extension to the true spiritual bodily structure of the being. By means of the above-mentioned physical body, living beings acquire the ability to experience animal or purely bodily pain and suffering, which cannot occur on the spiritual plane, it being the very plane of perfection and thereby of light and happiness.