Summa Theologiae Moralis, vol. I: De Principiis

S. Th. II-II, q. 24, a. 4-9; q. 184, a. 2; I-II, q. 114, a. 8; III, q. 89, a. 2 and 5; Q. D. de Virt. q. 1, a. 11.

867. Charity on the way can be increased intensively. — The charity of the fatherland cannot be increased because it is at its term. — The charity of the way cannot be increased extensively, i.e. by extending itself to new objects, because the smallest charity extends itself to all things which are to be loved out of charity. But it can be increased intensively, inasmuch as it becomes more intense, stronger and more prompt for acting.

Which is done not indeed by an addition of charity to charity, but by this alone that the same charity is more received and more firmly inheres, and man more participates charity, and is more reduced into act according to it, as was explained in tr. on Virtue in gen., n. 570.

It is proved: For he who is on the way can always approach nearer to the term; but the term of the way is God; therefore on earth we can always approach nearer to God. Now by charity we tend and approach to God, to whom we do not approach by steps of the body but by affections of the mind by which we are united to him; therefore the charity of the way can always be increased. Cfr. Eph. IV, 15-16; Phil. I, 9; Prov. IV, 18; and C. Trid., sess. 6, can. 24 and 32, c. 10: "This increase of justice holy Church asks when she prays: Give us the increase of faith, hope and charity".

868. Charity can be increased without end, as was defined in C. Vien., can. 1 against the Beguards. For there is no reason why its increase should be limited: 1) from its essence it is a participation of the infinite charity of God, which can always be more participated; 2) the infinite virtue of God which is the cause of charity can always produce a greater charity; 3) man can always receive a greater charity, for, charity increasing, the aptitude for the increase of charity increases. Therefore from no part is there a reason for limiting this increase. — From divine preordination however no one in fact will arrive at the charity of Christ or of the B. V. M.

869. God is the principal efficient cause of the increase of charity, as of its production; but charity is increased instrumentally by the sacraments, dispositively and meritorily by good works. From the treatise on grace and on human acts we know that any act, whether of charity, or placed under the influence of charity, even the smallest, merits de congruo eternal life, and an increase of grace and charity. Whence Christ says, Mk. IX, 40: "For whoever shall give you to drink a cup of water in my name... shall not lose his reward". Cfr. C. Trid., sess. 6, c. 10 and 16, can. 32.

870. When then is charity increased? — Although every good act done out of charity disposes to the increase of charity, indeed merits it, it seems however that with S. Thomas we must say that not every act of charity in fact increases it, but this is done only by an intense act by which the agent as much as he can strives for the increase of charity, namely with all the powers of the charity which he has. For just as God does not infuse a determined degree of charity except in proportion to the disposition and striving of the will, so he does not seem to increase unless someone through an intense act strives for this. And then the increase is given not only on account of the last act but also on account of all preceding acts. "The spiritual increase of charity is in some way similar to bodily growth; but bodily growth in animals and plants is not a continuous motion...; but through some time the operating nature prepares for increase, and does not actually increase; and afterwards produces in effect that for which it has disposed, actually increasing the animal or the plant. So also not by every act of charity is charity actually increased; but every act disposes to the increase of charity, inasmuch as from one act of charity a man is rendered more prompt to act again according to charity, and with the aptitude increasing, the man becomes more prompt to an act of more fervent love, by which he strives for the progress of charity; and then charity is actually increased" (q. 24, a. 6). Cfr. de Virt., n. 640.

871. In what sense can charity be perfect. — Charity:

1) On the part of the object: of God who is lovable, circumscript the strength of wayfarers, cannot be perfect, because God can never be loved as much as he is lovable: thus therefore the only perfect charity is that by which God loves himself.

2) On the part of the subject: of the man loving, the charity of the fatherland is perfect because it is in a connatural state (while here we are pilgrims away from the Lord): a) for in it the conditions of friendship are perfectly verified: there is an excellent communication, the highest union, the perfect presence of the friend, conversation with him and possession of him; whence b) it is always carried actually toward God and indeed with all its strength; and therefore c) it is inamissible. Therefore although the habit of charity according to its essence is the same as in heaven, and can be equal in degree, indeed even greater in one wayfarer than in another blessed, according to the aforesaid conditions however the charity of the fatherland is always more perfect and more intense.

3) The charity of the way, although it cannot have the perfection of the fatherland because the whole heart of man actually is always carried toward God: for it is impossible on account of the infirmity of human life always actually to think of God and to be moved by love toward him; it can however be perfect inasmuch as it excludes all things that are repugnant to the movement of charity. And indeed in a twofold way:

a) that habitually one sets his whole heart upon God, so that he thinks or wills nothing that is contrary to divine love (or any mortal sin whatever), and this perfection is essential to charity which cannot be without it, and is common to all having charity, and is of necessity for salvation; b) that one strives to be free for God and divine things so that he is actually carried toward God inasmuch as the necessities of present life permit, and leaves other things except inasmuch as the necessity of present life requires; and such perfection is possible also for some on the way, and is of counsel, and belongs only to the perfect.

Whence the charity of the way on the part of man is in a triple state: for when someone has acquired charity, his principal care is to avoid sin (mortal) and to preserve charity, and then charity is called incipient (way of purging); then the principal care is to progress in good, and to avoid venial sins especially deliberate, and then charity is progressing (way of enlightening); finally the third care is to adhere to God, and to avoid those things which impede even a more perfect union with God, and then charity is perfect (way of union), not as in heaven, but as it can be perfect on earth, namely not so that he is actually always carried toward God, but that man does this inasmuch as the necessity of present life permits.

The first is prescribed under mortal sin, the second under venial, the third is not of precept; it would however be a sin to despise it, or to fix one's mind against spiritual progress.