2141. Bone and flesh stand in antagonism like air and earth. The muscle is that which is polarizing--moving, the bone what is polarized, moved. The muscle is heart, the bone the moved blood. Bone and muscle are related as that which is contained and what is containing. The muscle is the wall of the cyst, the bone, the fluid which has been secreted from it and rigidified. 2142. As therefore the muscle is an individual cyst, a heart, which cannot invest the whole body like a single large cyst, so also must the muscular contents be only a discrete cyst. The uninterrupted character of the bones depends therefore upon that of the muscles, and the latter upon the meaning of the heart. 2143. _A physiological rationale of the joints is accordingly afforded in the heart._ 2144. A bone is a rigidified, ossified heart; the osseous system is a series of mutually dependent, alternately ossified and non-ossified (arteriose and venous) hearts. 2145. The muscular cyst includes the soft bone, or the joint. 2146. At its two extremities there is preponderance of oxydation, whereby the soft osseous cysts are combusted into hard calcareous earth. 2147. The muscle is a cause of the alternating ossification. RELATION TO THE OSSEOUS SYSTEM. 2148. As the formation of bone predominates upon the side exposed to the light or the nervous, so does that of muscle upon the shady or vascular side. The abdominal side of the animal is the muscular, just as the dorsal side is the osseous. Upon the thorax, abdomen, on the members which belong to the anterior region of the body, and on the face, the muscular layer is by far the most predominant. Posteriorly, however, or upon the back, it is slightly wanting, and the bones there project. 2149. The back is related to the anterior surface (when regarded in man) as bone is to muscle. What is _in front_ is muscle, what is _behind_ is bone. The anterior side is therefore more active, nobler, more powerful and more spiritual than the posterior. Posteriorly stands the earth inert and rigidified, while in front is the air in ceaseless capacity for, and actually in, motion. The anterior muscular layer is more active and powerful than the posterior. 2150. In every muscular cyst there are two kinds of layers, an anterior and a posterior, or stronger and weaker layer. 2151. The stronger layer is the flexing, the weaker the extending. For the limbs have been necessarily bent forwards. The direction alone of the joints at once resides in the structure, which is even determined by these relations. Such a muscular layer, which mostly consists of several bundles, is termed a muscle. 2152. A muscular cyst consists of flexor and extensor muscles. The individual muscle is therefore only a piece of a cyst, and therefore not in itself hollow. It is only an entire muscular layer of flexors and extensors which is the pattern of the heart. The flexors are the strongest and are placed in front, the extensors lie behind.