God has given us all something to do. In the discharge of the various duties which we are to perform, which lie in our pathway, our lives will be made useful, and we shall be blessed. Not only will the organs of the body be strengthened by exercise, but the mind also will acquire strength and knowledge through the action of those organs. The exercise of one muscle, while others are left with nothing to do, will not strengthen the inactive ones any more than the continual exercise of one of the organs of the mind will develop and strengthen the organs not brought into use. Each faculty of the mind and each muscle has its distinctive office, and all require to be exercised in order to become properly developed and retain healthful vigor. Each organ and muscle has its work to do in the living organism. Every wheel in the machinery must be a living, active, working wheel. Nature’s fine and wonderful works need to be kept in active motion in order to accomplish the object for which they were designed. Each faculty has a bearing upon the others, and all need to be exercised in order to be properly developed. If one muscle of the body is exercised more than another, the one used will become much the larger, and will destroy the harmony and beauty of the development of the system. A variety of exercise will call into use all the muscles of the body. (3T 77.1) MC VC