Thomas Aquinas

“ Wherefore, in the first place, He directs man's will in respect of the various precepts of the Law: by prescribing that man should refrain not merely from those external works that are evil in themselves, but also from internal acts, and from the occasions of evil deeds. In the second place He directs man's intention, by teaching that in our good works, we should seek neither human praise, nor worldly riches, which is to lay up treasures on earth. ”

“ But he that shall deny Me before men, I will also deny him before My Father." On the other hand, there are works which are not necessarily opposed to, or in keeping with faith that worketh through love. ”

“ Art. 3 - Whether the New Law directed man sufficiently as regards interior actions? Objection 1: It would seem that the New Law directed man insufficiently as regards interior actions. For there are ten commandments of the decalogue directing man to God and his neighbor. But Our Lord partly fulfilled only three of them: as regards, namely, the prohibition of murder, of adultery, and of perjury. Therefore it seems that, by omitting to fulfil the other precepts, He directed man insufficiently. ”

“ Wherefore Our Lord set this aside by teaching, first of all, that works of virtue should not be done for human glory. And He mentions three works, to which all others may be reduced: since whatever a man does in order to curb his desires, comes under the head of fasting; and whatever a man does for the love of his neighbor, comes under the head of alms-deeds; and whatever a man does for the worship of God, comes under the head of prayer. ”

“ But every command issued against the inclination of nature is an unjust command, forasmuch as it is contrary to the law of nature. Therefore it seems that Our Lord unbecomingly forbade solicitude about food and raiment. ”

“ These are the sacraments of the New Law.
The right use of grace is by means of works of charity. These, in so far as they are essential to virtue, pertain to the moral precepts, which also formed part of the Old Law. Hence, in this respect, the New Law had nothing to add as regards external action. The determination of these works in their relation to the divine worship, belongs to the ceremonial precepts of the Law; and, in relation to our neighbor, to the judicial precepts, as stated above (Q [99] , A [4] ) . ”

“ Therefore certain observances pertaining to the faithful should also have been instituted in the New Law.
Objection 4: Further, in the Old Law, besides moral and ceremonial precepts, there were certain judicial precepts. But in the New Law there are no judicial precepts. Therefore the New Law made insufficient ordinations about external works.
On the contrary, Our Lord said (Mat. 7:24) : "Every one . . . that heareth these My words, and doth them, shall be likened to a wise man that built his house upon a rock." But a wise builder leaves out nothing that is necessary to the building. ”

“ And they held this opinion about murder and adultery rather than about theft and false witness, because the movement of anger tending to murder, and the movement of desire tending to adultery, seem to be in us from nature somewhat, but not the desire of stealing or bearing false witness. ”

“ Accordingly the New Law had no other external works to determine, by prescribing or forbidding, except the sacraments, and those moral precepts which have a necessary connection with virtue, for instance, that one must not kill, or steal, and so forth.
Reply to Objection 1: Matters of faith are above human reason, and so we cannot attain to them except through grace. Consequently, when grace came to be bestowed more abundantly, the result was an increase in the number of explicit points of faith. ”

“ The aforesaid counsels, considered in themselves, are expedient to all; but owing to some people being ill-disposed, it happens that some of them are inexpedient, because their disposition is not inclined to such things. Hence Our Lord, in proposing the evangelical counsels, always makes mention of man's fitness for observing the counsels. ”

“ But there are many other temporal goods besides the favor of man: and there are many other good works besides fasting, alms-deeds, and prayer. Therefore Our Lord unbecomingly taught that only in respect of these three works, and of no other earthly goods ought we to shun the glory of human favor.
Objection 5: Further, solicitude for the necessary means of livelihood is by nature instilled into man, and this solicitude even other animals share with man: wherefore it is written (Prov. 6:6, 8) : "Go to the ant, O sluggard, and consider her ways . ”

“ Moreover, every form of the religious life that professes the state of perfection is based on these three: since riches are renounced by poverty; carnal pleasures by perpetual chastity; and the pride of life by the bondage of obedience. ”

“ The greater goods are not definitely fixed in the individual; but those which are simply and absolutely the greater good in general are fixed: and to these all the above particular goods may be reduced, as stated above.
Reply to Objection 3: Even the counsel of obedience is understood to have been given by Our Lord in the words: "And [let him] follow Me." For we follow Him not only by imitating His works, but also by obeying His commandments, according to Jn. ”

“ Therein man's interior movements are ordered. Because after declaring that his end is Beatitude; and after commending the authority of the apostles, through whom the teaching of the Gospel was to be promulgated, He orders man's interior movements, first in regard to man himself, secondly in regard to his neighbor. ”