+III. The importance of keeping the heart.+ "Out of it are the issues of life." The physical heart of man is well defended by nature, because it is the spring of our bodily life. From it, as from a well, issues life-blood, which flows into every part of the body, and without which a man ceases to live. The strong ribs and the inner coverings of the heart which so well defend it show the necessity there is that it should be free to do its work without let or hindrance. "A sound heart is the life of the flesh," says Solomon (chap. xiv. 30). If the heart is healthy, the benefit is felt to the extremities of the body; if it is diseased, the whole physical frame suffers. Out if _it_ are the issues of animal life. A man who has charge of a well of water is bound to keep it covered and secured against the entrance of anything that might poison or even defile it. Upon its safe keeping depends, perhaps, not only the health of himself and his household, but that of an entire district. It is a centre of health if pure, of disease if impure. So upon the condition of the inner man depends the character of the outward life. It is a well-spring of life in the sense that it determines the character of the life. The streams which issue from it are the actions of man, actions repeated are habits, and habits form character; and character influences other lives. What a man _is_ blesses or curses those around him, and entails blessing or curse upon generations to come. A good man in a neighbourhood is like a well of living water, he diffuses and preserves moral health all around him.