One rash utterance, like that of Dr. Bach, can do an incalculable amount of harm. Why, gentlemen, just think what consequences must follow if his principle were, admitted! For the only reason that could give it any plausibility would be that the patient's life is become useless and insupportable. If that were a reason for taking human life away, then it would follow that, whenever a man considers his life as useless and no longer supportable, he could end it, he could commit suicide. That reasoning would practically justify almost all suicides. For, when people kill themselves, it is, in almost all cases, because they consider their lives useless and insupportable. Whether it results from physical or from moral causes that they consider their life a burden, cannot, it seems to me, make any material difference; grief, shame, despair are as terrible sufferings as bodily pains. If, then, we accept Dr. Bach's principle, we must be prepared for all its baneful consequences. IV. But are there no exceptions to the general law, "Thou shalt not kill"? Are there no cases in which it is allowed to take another's life? What about justifiable homicide? There are three cases of this nature, gentlemen; namely, self-defence, capital punishment inflicted by the state, and active warfare. With only one of these can a physician, as such be concerned or think himself concerned. He is not a public hangman executing a sentence of a criminal court; nor is he acting as a soldier proceeding by public authority against a public foe. As to the plea of self-defence, it must be correctly understood, lest he usurp a power which neither human nor divine law has conferred upon him. 1. _Self-defence._ It is a dictate of common-sense, already quoted by Cicero as a universally received maxim of Jurisprudence in his day, that it is justifiable to repel violence by violence, even if the death of our unjust assailant should result. In such a case, let us consider what really takes place. A ruffian attempts to take away my life; I have a right to my life. I may, therefore, protect it against him; and, for that purpose, I may use all lawful means. A lawful means is one that violates no law, one that I may use without giving any one reasonable ground of complaint. Suppose I have no other means to protect my life than by shooting my aggressor; has he a right to complain of my conduct if I try to do so? No, because he forces me to the act; he forces me to choose between my life and his. Good order is not violated if I prefer my own life: well-ordered charity begins at home. But is not God's right violated? It is; for God has a right to my life and to that of my assailant. The ruffian who compels me to shoot him is to blame for bringing both our lives into danger; he is responsible for it to God. But the Creator will not blame me for defending my life by the only means in my power, and that when compelled by an unjust assailant, who cannot reasonably find fault with my conduct.