Had Saul observed his oaths, what injury had he done, what mischief had he produced, in slaughtering his most worthy and most innocent son, the prop and glory of his family, the bulwark of his country, and the grand instrument of salvation to it; in forcing the people to violate their cross oath, and for prevention of one, causing many perjuries? He was therefore fain to desist, and lie under the guilt of breaking his oaths.
And for Herod, the excellent father thus presseth the consideration of his case: “Take,” saith he, “I beseech you, the chopped off head of St. John, and his warm blood yet trickling down; each of you bear it home with you, and conceive that before your eyes you hear it uttering speech, and saying, Embrace the murderer of me, an oath. That which reproof did not, this an oath did do; that which the tyrant’s wrath could not, this the necessity of keeping an oath did effect. For when the tyrant was reprehended publicly in the audience of all men, he bravely did bear the rebuke; but when he had cast himself into the necessity of oaths, then did he cut off that blessed head.”
VI. Likewise the use of rash swearing will often engage a man in undertakings very inconvenient and detrimental to himself. A man is bound to perform his vows to the Lord, whatever they be, whatever damage or trouble thence may accrue to him, if they be not unlawful. It is the law, that which is gone out of thy lips, thou shalt keep and perform. It is the property of a good man, that he sweareth to his own hurt, and changeth not. Wherefore ’tis the part of a sober man to be well advised what he doth swear or vow religiously, that he do not put himself into the inextricable strait of committing great sin, or undergoing great inconvenience; that he do not rush into that snare of which the wise man speaketh, “It is a snare to a man to devour that which is holy (or, to swallow a sacred obligation), and after vows to make inquiry,” seeking how he may disengage himself the doing which is a folly offensive to God, as the Preacher telleth us. “When,” saith he, “thou vowest a vow unto God, defer not to pay it; for He hath no pleasure in fools: pay that which thou hast vowed.” God will not admit our folly in vowing as a plea for non-performance; He will exact it from us both as a due debt, and as a proper punishment of our impious folly.
For instance, into what loss and mischief, what sorrow, what regret and repentance, did the unadvised vow of Jephthah throw him; the performance whereof, as St. Chrysostom remarketh, God did permit, and order to be commemorated with solemn lamentation, that all posterity might be admonished thereby, and deterred from such precipitant swearing.
VII. Let us consider that swearing is a sin of all others peculiarly clamorous, and provocative of Divine judgment. God is hardly so much concerned, or in a manner constrained, to punish any other sin as this. He is bound in honour and interest to vindicate His name from the abuse, His authority from the contempt, His holy ordinance from the profanation, which it doth infer. He is concerned to take care that His providence be not questioned, that the dread of His majesty be not voided, that all religion be not overthrown by the outrageous commission thereof with impunity.
It immediately toucheth His name, it expressly calleth upon Him to mind it, to judge it, to show himself in avenging it. He may seem deaf, or unconcerned, if, being so called and provoked, He doth not declare Himself.
There is understood to be a kind of formal compact between Him and mankind, obliging Him to interpose, to take the matter into His cognisance, being specially addressed to Him.
The bold swearer doth importune Him to hear, doth rouse Him to mark, doth brave Him to judge and punish his wickedness.
Hence no wonder that “the flying roll,” a quick and inevitable curse, doth surprise the swearer, and cut him off, as it is in the prophet. No wonder that so many remarkable instances do occur in history of signal vengeance inflicted on persons notably guilty of this crime. No wonder that a common practice thereof doth fetch down public judgments; and that, as the prophets of old did proclaim, “because of swearing the land mourneth.”
VIII. Further (passing over the special laws against it, the mischievous consequences of it, the sore punishments appointed to it), we may consider, that to common sense vain swearing is a very unreasonable and ill-favoured practice, greatly misbecoming any sober, worthy, or honest person; but especially most absurd and incongruous to a Christian.