It is just as necessary for the nurse to be careful of herself as of the patient, though her care must be manifested in a far different way. Always remember that to do really good work you must have really good tools. No man owning, and intelligently working a valuable machine, would keep it going at its highest speed all the time. He takes care of it, keeps it clean, renews defective parts, oils it; and then he expects it to run for so many hours, and to run well,--to do its work thoroughly. But with all his keeping it in order he does not make it work night and day for weeks or months. Such folly is never heard of in an engineer; but with us human beings, who own and manage a far more wonderful machine than any steam engine, we hear of it often, and always, _always_ the tale winds up with the inevitable catastrophe. The business man develops paresis, the clergyman loses his voice or his eyes, the nurse contracts some disease that incapacitates her for work, in every case mother Nature makes the careless or ignorant owner of the wonderful machine pay the penalty of the misuse. It does not matter to Nature what the reason is for our breaking the great laws; we can kill ourselves with philanthropic work just as surely as with over indulgence. One trouble is, that it does not always _kill._ A paralytic may live for years, so does a man with paresis. When the wonderful God-given machine works badly, or stops entirely, we look on, and sometimes wonder why it is that those who are so helpful, such fine examples of courage, of skill, of virtue, so hardly to be spared, are the ones to be taken away. Do _we_ wonder, we who are nurses? Do we not know what did it? Ah! yes--we know, we know, that such and such a nurse was tired out when she went to still another case-- and when we heard she herself was ill we were not slow to say, "Foolish girl! Did she suppose she was made of wrought iron and sole leather?" But will _we_ take heed, and not do likewise, or will we wonder, with the unthinking ones, why it is that the good, useful people are always taken away? Do not deceive yourselves; they are not "taken away," they take themselves away, for God will not reverse His wise laws because we (no matter how good we are) act in defiance of them. Please remember I am only speaking now to the good nurses--the enthusiastic ones,--poor nurses, lazy nurses have no temptation to overwork themselves. They may die of indigestion, but they will not die of exhaustion.