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Famous Thomas Aquinas Quotes

“If the citizens themselves devote their life to matters of trade, the way will be opened to many vices. Since the foremost tendency of tradesmen is to make money, greed is awakened in the hearts of the citizens through the pursuit of trade. The result is that everything in the city will bcome venal; good faith will be destroyed and the way opened to all kinds of trickery; each one will work only for his own profit, despising the public good; the cultivation of virtue will fail since honor, virtue's reward, will be bestowed upon the rich. Thus, in such a city, civic life will necessarily be corrupted. (On Kingship II, 3)”

PhilosophyPoliticsWealthMoneyEthicsCapitalismEconomicsTheologyCivicsThomism
Author:Thomas Aquinas
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“For every relationship involves two related terms. Sometimes relationships are not real in either term, but arise from the way we think of the terms: we think identity, for example, by thinking one thing twice over and relating it to itself; and occasionally we relate what exists to what does not exist, or generate purely logical relations like that of genus to species. Sometimes relationships are real in both terms: grounded in the quantity of both, in the case of relationships like big/small or double/half, or in their activity and passivity, in the case of causal relationships, like mover-moved and father/son. Sometimes relationships are real in only one of the terms, with the other merely thought of as related [reciprocally] to that one; and this happens whenever the two terms exist at different levels. Thus seeing and understanding really relates us to things, but being seen and understood by us is not something real in the things; and similarly a pillar to the right of us does not itself have a left and a right.”

PhilosophyLogicOntology
Book:Summa Theologiae: A Concise Translation
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“*There is only one God*. Whatever exists is *ipso facto* individual; to be one it needs no extra property and calling it one merely denies that it is divided. Simple things are neither divided nor divisible; composite things do not exist when their parts are divided. So existence stands or falls with individuality, and things guard their unity as they do their existence. But what is simply speaking one can yet in certain respects be many: an individual thing, essentially undivided, can have many non-essential properties; and a single whole, actually undivided, can have potentially many parts. Only when one is used to count with does it presuppose in what it counts some extra property over and above existence, namely, quantity. The one we count with contrasts with the many it counts in the way a unity of measurement contrasts with what it measures; but the individual unity common to everything that exists contrasts with plurality simply by lacking it, as undividedness does division. A plurality is however *a* plurality: though simply speaking many, inasmuch as it exists, it is, incidentally, one. A continuum is homogeneous: its parts share the form of the whole (every bit of water is water); but a plurality is heterogeneous: its parts lack the form of the whole (no part of the house is a house). The parts of a plurality are unities and non-plural, though they compose the plurality not as non-plural but as existing; just as the parts of a house compose the house as material, not as not houses. Whereas we define plurality in terms of unity (many things are divided things to each of which is ascribed unity), we define unity in terms of division. For division precedes unity in our minds even if it doesn’t really do so, since we conceive simple things by denying compositeness of them, defining a point, for example, as lacking dimension. Division arises in the mind simply by negating existence. So the first thing we conceive is the existent, then―seeing that this existent is not that existent―we conceive division, thirdly unity, and fourthly plurality. There is only one God. Firstly, God and his nature are identical: to be God is to be this individual God. In the same way, if to be a man was to be Socrates there would only be one man, just as there was only one Socrates. Moreover, God’s perfection is unlimited, so what could differentiate one God from another? Any extra perfection in one would be lacking in the other and that would make him imperfect. And finally, the world is one, and plurality can only produce unity incidentally insofar as it too is somehow one: the primary and non-incidental source of unity in the universe must himself be one. The one we count with measures only material things, not God: like all objects of mathematics, though defined without reference to matter, it can exist only in matter. But the unity of individuality common to everything that exists is a metaphysical property applying both to non-material things and to God. But what in God is a perfection has to be conceived by us, with our way of understanding things, as a lack: that is why we talk of God as lacking a body, lacking limits and lacking division.”

PhilosophyLogicTheologyMereology
Book:Summa Theologiae: A Concise Translation
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“They are provoked to anger and aggression, which are virile passions. These make a man think that he is in danger of suffering some future evil (which he intends to resist). When men are so disposed, they do not have mercy on others. Likewise the proud do not have mercy because they despise others and look upon them as evil, taking it for granted that these people deserve to suffer whatever they have to suffer.”

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Book:Summa Theologica
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“Commemoration of Gilbert of Sempringham, Founder of the Gilbertine Order, 1189 Some there are who presume so far on their wits that they think themselves capable of measuring the whole nature of things by their intellect, in that they esteem all things true which they see, and false which they see not. Accordingly, in order that man's mind might be freed from this presumption, and seek the truth humbly, it was necessary that certain things far surpassing his intellect should be proposed to man by God.”

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Author:Thomas Aquinas
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“The Sacrament of the Body of the Lord puts the demons to flight, defends us against the incentives to vice and to concupiscence, cleanses the soul from sin, quiets the anger of God, enlightens the understanding to know God, inflames the will and the affections with the love of God, fills the memory with spiritual sweetness, confirms the entire man in good, frees us from eternal death, multiplies the merits of a good life, leads us to our everlasting home, and re-animates the body to eternal life”

KnowsMenSoulHomeBodySpiritualUnderstandingMemoriesSinLordEternalAffectionVicesFlightGod LoveMeritDemonGood LifeSacramentsSweetnessEverlastingIncentivesKnowing GodEnlighteningEternal Life
Author:Thomas Aquinas
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“[It is appropriate that the Body and Blood of Christ be truly present in this Sacrament] because of the perfection of the New Covenant. The sacrifices of the Old Covenant contained the true sacrifice of Christ's Passion only in symbol....Therefore it was necessary that the sacrifice of the New Covenant, instituted by Christ, have something more, namely, that it contain Christ Himself who has suffered and contain Him not only in symbol but in reality.”

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Author:Thomas Aquinas
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“If you seek patience, you will find no better example than the cross. Great patience occurs in two ways: either when one patiently suffers much, or when one suffers things which one is able to avoid and yet does not avoid. Christ endured much on the cross, and did so patiently, because when he suffered he did not threaten; he was led like a sheep to the slaughter and he did not open his mouth.”

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Author:Thomas Aquinas
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“The fact that the evil ones, as long as they live, can be corrected from their errors does not prohibit that they may be justly executed, for the danger which threatens from their way of life is greater and more certain than the good which may be expected from their improvement.”

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Book:Summa Contra Gentiles: Book 3: Providence
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“One faith, St. Paul writes (Eph. 4:5). Hold most firmly that our faith is identical with that of the ancients. Deny this, and you dissolve the unity of the Church ... We must hold this for certain, namely: that the faith of the people at the present day is one with the faith of the people in past centuries. Were this not true, then we would be in a different church than they were in and, literally, the Church would not be One.”

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Author:Thomas Aquinas
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“Even as he would be guilty of falsehood who would, in the name of another person, proffer things that are not committed to him, so too does a man incur the guilt of falsehood who, on the part of the Church, gives worship to God contrary to the manner established by the Church or divine authority, and according to ecclesiastical custom.”

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Book:Summa Theologica.ed
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