Thomas Aquinas

“ Neither, therefore, can any one grant a dispensation from a vow.
On the contrary, That which proceeds from the common will of many has apparently greater stability than that which proceeds from the individual will of some one person. Now the law which derives its force from the common will admits of dispensation by a man. Therefore it seems that vows also admit of dispensation by a man. ”

“ Now from the very fact that a man has a purpose of doing good, he puts his hand to the plough. Consequently, if he look back by desisting from his good purpose, he is not fit for the kingdom of God. Therefore by a mere good purpose a man is bound before God, even without making a promise; and consequently it would seem that a vow consists in a mere purpose of the will. ”

“ Wherefore the act of an inferior virtue is the better the more meritorious for being commanded by a superior virtue, whose act it becomes through being commanded by it, just as the act of faith or hope is better if it be commanded by charity. Hence the works of the other moral virtues (for instance, fasting, which is an act of abstinence; and being continent, which is an act of chastity) are better and more meritorious, if they be done in fulfilment of a vow, since thus they belong to the divine worship, being like sacrifices to God. ”

“ As stated above, one reason for granting a dispensation from a vow is if it be an obstacle to a greater good. But a vow of continency, even though it be solemn, may be an obstacle to a greater good, since the common good is more God-like than the good of an individual. Now one man's continency may be an obstacle to the good of the whole community, for instance, in the case where, if certain persons who have vowed continency were to marry, the peace of their country might be procured. ”

“ Even so, when a superior grants a dispensation, that which was contained under a vow is by his authority no longer so contained, in so far as he decides that in this case such and such a thing is not fitting matter for a vow. Consequently when an ecclesiastical superior dispenses someone from a vow, he does not dispense him from keeping a precept of the natural or of the Divine law, but he pronounces a decision on a matter to which a man had bound himself of his own accord, and of which he was unable to consider every circumstance. ”

“ It would seem that a vow is not an act of latria or religion. Every act of virtue is matter for a vow. Now it would seem to pertain to the same virtue to promise a thing and to do it. Therefore a vow pertains to any virtue and not to religion especially. ”

“ It is not expedient to anyone to deprive himself of the good that God has given him. Now one of the greatest goods that God has given man is liberty whereof he seems to be deprived by the necessity implicated in a vow. Therefore it would seem inexpedient for man to take vows.
Objection 2: Further, no one should expose himself to danger. But whoever takes a vow exposes himself to danger, since that which, before taking a vow, he could omit without danger, becomes a source of danger to him if he should not fulfil it after taking the vow. ”

“ Wherefore, as every sin is against God, and since no work is acceptable to God unless it be virtuous, it follows that nothing unlawful or indifferent, but only some act of virtue, should be the matter of a vow. But as a vow denotes a voluntary promise, while necessity excludes voluntariness, whatever is absolutely necessary, whether to be or not to be, can nowise be the matter of a vow. For it would be foolish to vow that one would die or that one would not fly. ”

“ Hence it is evident that some vows belong to religion by reason only of the promise made to God, which is the essence of a vow, while others belong thereto by reason also of the thing promised, which is the matter of the vow.
Reply to Objection 2: He who promises something gives it already in as far as he binds himself to give it: even as a thing is said to be made when its cause is made, because the effect is contained virtually in its cause. This is why we thank not only a giver, but also one who promises to give. ”

“ That such an obligation be of no force may happen in two ways. First, through defect of reason, as in madmen and imbeciles, who cannot bind themselves by vow so long as they remain in a state of madness or imbecility. Secondly, through the maker of a vow being subject to another's power, as stated above (A [8] ) . Now these two circumstances concur in children before the age of puberty, because in most instances they are lacking in reason, and besides are naturally under the care of their parents, or guardians in place of their parents: wherefore in both events their vows are without force. ”

“ Honesty demands that a man should keep any promise he makes to another man, and this obligation is based on the natural law. But for a man to be under a civil obligation through a promise he has made, other conditions are requisite. And although God needs not our goods, we are under a very great obligation to Him: so that a vow made to Him is most binding. ”

“ Hence no prelate of the Church can make a man, who has pronounced a solemn vow, to be quit of that to which he was consecrated, e.g. one who is a priest, to be a priest no more, although a prelate may, for some particular reason, inhibit him from exercising his order. In like manner the Pope cannot make a man who has made his religious profession cease to be a religious, although certain jurists have ignorantly held the contrary. ”

“ According to the Philosopher, necessity of coercion, in so far as it is opposed to the will, causes sorrow. But the necessity resulting from a vow, in those who are well disposed, in so far as it strengthens the will, causes not sorrow but joy. ”

“ Even as one's liberty is not lessened by one being unable to sin, so, too, the necessity resulting from a will firmly fixed to good does not lessen the liberty, as instanced in God and the blessed. Such is the necessity implied by a vow, bearing a certain resemblance to the confirmation of the blessed. ”

“ Therefore absolutely speaking man can vow them. But it does belong to a prelate to decide what is the more virtuous and the more acceptable to God. Consequently in matters presenting no difficulty, the prelate's dispensation would not excuse one from sin: for instance, if a prelate were to dispense a person from a vow to enter the religious life, without any apparent cause to prevent him from fulfilling his vow. But if some cause were to appear, giving rise, at least, to doubt, he could hold to the prelate's decision whether of commutation or of dispensation. ”

“ He who does something without having vowed it has an immovable will as regards the individual deed which he does and at the time when he does it; but his will does not remain altogether fixed for the time to come, as does the will of one who makes a vow: for the latter has bound his will to do something, both before he did that particular deed, and perchance to do it many times. ”

“ Therefore to vow is to promise, and a vow is a promise.
I answer that, A vow denotes a binding to do or omit some particular thing. Now one man binds himself to another by means of a promise, which is an act of the reason to which faculty it belongs to direct. For just as a man by commanding or praying, directs, in a fashion, what others are to do for him, so by promising he directs what he himself is to do for another. Now a promise between man and man can only be expressed in words or any other outward signs ”

“ Even as man is bound by natural law and Divine precept to fulfil his vow, so, too, is he bound under the same heads to obey the law or commands of his superiors. And yet when he is dispensed from keeping a human law, this does not involve disobedience to that human law, for this would be contrary to the natural law and the Divine command ”

“ Now a promise is about something that one does voluntarily for someone else: since it would be not a promise but a threat to say that one would do something against someone. In like manner it would be futile to promise anyone something unacceptable to him. ”

“ Since, however, man is easily mistaken in judging of matters concerning himself, such vows as these are more fittingly kept or disregarded according to the judgment of a superior, yet so that, should a man find that without doubt he is seriously burdened by keeping such a vow, and should he be unable to appeal to his superior, he ought not to keep it. ”

“ As soon as a man comes of age, if he be a freeman he is in his own power in all matters concerning his person, for instance with regard to binding himself by vow to enter religion, or with regard to contracting marriage. ”

“ Wherefore even though one may be able to do something now and then, when one is not being occupied with other things by one's superior, yet since there is no time when his superior cannot occupy him with something, no vow of a religious stands without the consent of his superior, as neither does the vow of a girl while in (her father's) house without his consent ”

“ This kind of solemnization regards not only men but also God in so far as it is accompanied by a spiritual consecration or blessing, of which God is the author, though man is the minister, according to Num. 6:27, "They shall invoke My name upon the children of Israel, and I will bless them." Hence a solemn vow is more binding with God than a simple vow, and he who breaks a solemn vow sins more grievously. When it is said that a simple vow is no less binding than a solemn vow, this refers to the fact that the transgressor of either commits a mortal sin. ”

“ If that which a man has vowed becomes impossible to him through any cause whatsoever, he must do what he can, so that he have at least a will ready to do what he can. Hence if a man has vowed to enter a monastery, he must endeavor to the best of his power to be received there. ”

“ Much less, therefore, can a prelate make a man that is consecrated to God cease to be consecrated, so long as he lives. Now the solemnity of a vow consists in a kind of consecration or blessing of the person who takes the vow, as stated above (A [7] ) . ”

“ It happens, however, through a natural disposition which is not subject to human laws, that the use of reason is accelerated in some, albeit few, who on this account are said to be capable of guile: and yet they are not, for this reason, exempt in any way from the care of their parents; for this care is subject to human law, which takes into account that which is of most frequent occurrence. ”

“ But religious who are under the power of their superiors can do certain things such as to say some psalms, or abstain from certain things. Much more therefore seemingly can they promise such things to God by means of vows. ”

“ Further, if a man is bound to pay something, he must do so at once. But a man is not bound to pay his vow at once, especially if it be taken under a condition to be fulfilled in the future. Therefore a vow is not always binding. ”

“ When danger arises from the deed itself, this deed is not expedient, for instance that one cross a river by a tottering bridge: but if the danger arise through man's failure in the deed, the latter does not cease to be expedient: thus it is expedient to mount on horseback, though there be the danger of a fall from the horse: else it would behoove one to desist from all good things, that may become dangerous accidentally. ”

“ Wherefore Augustine says (De Virg. viii) that "not even is virginity honorable as such, but only when it is consecrated to God, and cherished by godly continence."
Secondly, because he that vows something and does it, subjects himself to God more than he that only does it; for he subjects himself to God not only as to the act, but also as to the power, since in future he cannot do something else. ”