It may be observed likewise, that the injury done to the freedom of judgment is, in such a case, of less consequence, because it is but momentary, and the real fact is soon discovered.
XV. There is a fourth case, which bears a near affinity to those above mentioned, and that is, when any one, possessing pre-eminent authority, orders another, in a subordinate capacity, to execute some device or stratagem, conducive either to his individual, or to the public welfare. Which Plato seems to have had particularly in view, in allowing those in authority to avail themselves of pretexts, or stratagems. The same writer is very correct in his notion of not making such a device a characteristic of that authority, which belongs to the supreme being. For all such devices, however justifiable they may be in CERTAIN CASES, strongly betray that imperfection, which is inseparable from all human systems.
The stratagem, which Joseph employed to obtain further discoveries without making himself known to his brethren, is much commended by Philo, as a mark of great policy, when, contrary to the convictions and feelings of his own mind, he accused them of being spies, and afterwards charged them with theft. It was by a stratagem of the same kind, that Solomon gave proof of his inspired wisdom, when he used the FICTITIOUS threat of dividing the living child in order to discover the real mother.
XVI. The fifth case, which allows a stratagem to be practised, is that, where it may be the ONLY means of saving the life of an innocent person, of obtaining some object of equal importance, or of diverting another from the perpetration of some horrid design. The heathen poet has given a beautiful illustration of this in his praises of Hypermnestra, whose conduct he calls "a splendid stratagem, ennobling the virgin to all posterity."
XVII. It is evident that many writers of acknowledged wisdom, and sober judgment, have carried the point farther than has been done in this treatise, in allowing the use of false representations to an enemy. In cases, where public enemies are concerned, they maintain, that it is lawful to deviate from those strict rules of avowing and disclosing all our intentions, which they prescribe, on all other occasions. Such is the opinion of Plato and Xenophon among the Greeks, of Philo among the Jews, and Chrysostom among Christians. It may not perhaps be amiss to cite, in this place, the message sent by the men of Jabesh Gilead to the Ammonites, by whom they were besieged, and also that of the prophet Elisha, and at the same time to mention the conduct of Valerius Laevinus, who boasted of having killed Pyrrhus.
The third, the fourth and fifth observations above made, may be illustrated from what is said by Eustratus, Archbishop of Nice, "An able and upright counsellor is not obliged to disclose the whole truth: for there may be occasions, when it may be necessary for him to recommend the means of deceiving an enemy, or to employ some stratagem towards a friend, where it may turn to his advantage."
XVIII. What has been said of false speaking must be understood as applied to affirmative declarations, which can be prejudicial to no persons, but public enemies: it can by no means be taken to include promises. For promises confer upon the person, to whom they are made, a peculiar right to claim their full performance. And this is a rule, which must take place, even between public enemies; a rule to which existing hostilities are not allowed to form an exception. It is a maxim proper to be enforced in TACIT, as well as in EXPRESS agreements: as when a parley or conference is demanded, there is always an IMPLIED promise, that both sides shall attend it with perfect safety. But these are points reserved for the discussion of another part of this treatise.
XIX. It will be necessary to repeat an observation made before, with respect to oaths, both of the affirmative and promissory kind, where it was maintained that they exclude all exceptions, all mental reservations towards the person, to whom they are made, being regarded not merely as a solemn transaction with that individual, but as a stedfast appeal to God. Such an appeal to the supreme being demands the performance of an oath, even if it gave the individual no right to the same.
At the same time it was observed, that a sworn declaration is not like one of any other kind, where an application of terms different from their usual meaning may supply the speaker with an excuse for evading their import. But truth requires every declaration and promise to be made in terms, which it is supposed that every man of integrity and clear judgment will understand, spurning at the impious thought, that men may be deceived by oaths, as children are by toys and trifles.
XX. Some nations and individuals indeed have rejected the use of those stratagems, which even the law of nature allows to be employed as a means of self-defence against an enemy. But they did so, not from any opinion of their unlawfulness, but from a noble loftiness of mind, and from a confidence in their own strength. Aelian has preserved a saying of Pythagoras, "that there are two things, in which man approaches nearest to God, in always speaking the truth, and doing good to others." Aristotle, somewhere in his Ethics, calls speaking truth, the freedom of a great soul, and Plutarch says, that falsehood is the qualification of a slave. But an adherence to truth, in simplicity of heart, is not the only duty required of Christians, in this respect, they are commanded to abstain from all vain discourse, as having for their example him, in whose mouth there was found no guile.