Chapter 20.--That Christians Have No Authority for Committing Suicide in Any Circumstances Whatever.
It is not without significance, that in no passage of the holy canonical books there can be found either divine precept or permission to take away our own life, whether for the sake of entering on the enjoyment of immortality, or of shunning, or ridding ourselves of anything whatever. Nay, the law, rightly interpreted, even prohibits suicide, where it says, "Thou shalt not kill." This is proved especially by the omission of the words "thy neighbor," which are inserted when false witness is forbidden: "Thou shalt not bear false witness against thy neighbor." Nor yet should any one on this account suppose he has not broken this commandment if he has borne false witness only against himself. For the love of our neighbor is regulated by the love of ourselves, as it is written, "Thou shalt love thy neighbor as thyself." If, then, he who makes false statements about himself is not less guilty of bearing false witness than if he had made them to the injury of his neighbor; although in the commandment prohibiting false witness only his neighbor is mentioned, and persons taking no pains to understand it might suppose that a man was allowed to be a false witness to his own hurt; how much greater reason have we to understand that a man may not kill himself, since in the commandment, "Thou shalt not kill," there is no limitation added nor any exception made in favor of any one, and least of all in favor of him on whom the command is laid! And so some attempt to extend this command even to beasts and cattle, as if it forbade us to take life from any creature. But if so, why not extend it also to the plants, and all that is rooted in and nourished by the earth? For though this class of creatures have no sensation, yet they also are said to live, and consequently they can die; and therefore, if violence be done them, can be killed. So, too, the apostle, when speaking of the seeds of such things as these, says, "That which thou sowest is not quickened except it die;" and in the Psalm it is said, "He killed their vines with hail." Must we therefore reckon it a breaking of this commandment, "Thou shalt not kill," to pull a flower? Are we thus insanely to countenance the foolish error of the Manichæans? Putting aside, then, these ravings, if, when we say, Thou shalt not kill, we do not understand this of the plants, since they have no sensation, nor of the irrational animals that fly, swim, walk, or creep, since they are dissociated from us by their want of reason, and are therefore by the just appointment of the Creator subjected to us to kill or keep alive for our own uses; if so, then it remains that we understand that commandment simply of man. The commandment is, "Thou shall not kill man;" therefore neither another nor yourself, for he who kills himself still kills nothing else than man.
Chapter 21.--Of the Cases in Which We May Put Men to Death Without Incurring the Guilt of Murder.
However, there are some exceptions made by the divine authority to its own law, that men may not be put to death. These exceptions are of two kinds, being justified either by a general law, or by a special commission granted for a time to some individual. And in this latter case, he to whom authority is delegated, and who is but the sword in the hand of him who uses it, is not himself responsible for the death he deals. And, accordingly, they who have waged war in obedience to the divine command, or in conformity with His laws, have represented in their persons the public justice or the wisdom of government, and in this capacity have put to death wicked men; such persons have by no means violated the commandment, "Thou shalt not kill." Abraham indeed was not merely deemed guiltless of cruelty, but was even applauded for his piety, because he was ready to slay his son in obedience to God, not to his own passion. And it is reasonably enough made a question, whether we are to esteem it to have been in compliance with a command of God that Jephthah killed his daughter, because she met him when he had vowed that he would sacrifice to God whatever first met him as he returned victorious from battle. Samson, too, who drew down the house on himself and his foes together, is justified only on this ground, that the Spirit who wrought wonders by him had given him secret instructions to do this. With the exception, then, of these two classes of cases, which are justified either by a just law that applies generally, or by a special intimation from God Himself, the fountain of all justice, whoever kills a man, either himself or another, is implicated in the guilt of murder.