1 Objection 1: It seems that God is not the supreme good. For the supreme good adds something to good; otherwise it would belong to every good. But everything which is an addition to anything else is a compound thing: therefore the supreme good is a compound. But God is supremely simple; as was shown above Question 3, Article 7). Therefore God is not the supreme good.
1 Ad secundum sic proceditur. Videtur quod Deus non sit summum bonum. Summum enim bonum addit aliquid supra bonum, alioquin omni bono conveniret. Sed omne quod se habet ex additione ad aliquid, est compositum. Ergo summum bonum est compositum. Sed Deus est summe simplex, ut supra ostensum est. Ergo Deus non est summum bonum.
2 Objection 2: Further, Good is what all desire, as the Philosopher says Ethic. i, 1). Now what all desire is nothing but God, Who is the end of all things: therefore there is no other good but God. This appears also from what is said Lk. 18, 19): None is good but God alone. But we use the word supreme in comparison with others, as for example, supreme heat is used in comparison with all other heats. Therefore God cannot be called the supreme good.
2 Praeterea, bonum est quod omnia appetunt, ut dicit philosophus. Sed nihil aliud est quod omnia appetunt, nisi solus Deus, qui est finis omnium. Ergo nihil aliud est bonum nisi Deus. Quod etiam videtur per id quod dicitur Matth. XIX, nemo bonus nisi solus Deus. Sed summum dicitur in comparatione aliorum; sicut summum calidum in comparatione ad omnia calida. Ergo Deus non potest dici summum bonum.
3 Objection 3: Further, supreme implies comparison. But things not in the same genus are not comparable; as, sweetness is not properly greater or less than a line. Therefore, since God is not in the same genus as other good things, as appears above Question 3, Article 5; Question 4, Article 3) it seems that God cannot be called the supreme good in relation to others.
3 Praeterea, summum comparationem importat. Sed quae non sunt unius generis, non sunt comparabilia; sicut dulcedo inconvenienter dicitur maior vel minor quam linea. Cum igitur Deus non sit in eodem genere cum aliis bonis, ut ex superioribus patet, videtur quod Deus non possit dici summum bonum respectu eorum.
4 On the contrary, Augustine says De Trin. ii) that, the Trinity of the divine persons is the supreme good, discerned by purified minds.
4 Sed contra est quod dicit Augustinus, I de Trin., quod Trinitas divinarum personarum est summum bonum, quod purgatissimis mentibus cernitur.
5 I answer that, God is the supreme good simply, and not only as existing in any genus or order of things. For good is attributed to God, as was said in the preceding article, inasmuch as all desired perfections flow from Him as from the first cause. They do not, however, flow from Him as from a univocal agent, as shown above Question 4, Article 2); but as from an agent which does not agree with its effects either in species or genus. Now the likeness of an effect in the univocal cause is found uniformly; but in the equivocal cause it is found more excellently, as, heat is in the sun more excellently than it is in fire. Therefore as good is in God as in the first, but not the univocal, cause of all things, it must be in Him in a most excellent way; and therefore He is called the supreme good.
5 Respondeo dicendum quod Deus est summum bonum simpliciter, et non solum in aliquo genere vel ordine rerum. Sic enim bonum Deo attribuitur, ut dictum est, inquantum omnes perfectiones desideratae effluunt ab eo, sicut a prima causa. Non autem effluunt ab eo sicut ab agente univoco, ut ex superioribus patet, sed sicut ab agente quod non convenit cum suis effectibus, neque in ratione speciei, nec in ratione generis. Similitudo autem effectus in causa quidem univoca invenitur uniformiter, in causa autem aequivoca invenitur excellentius, sicut calor excellentiori modo est in sole quam in igne. Sic ergo oportet quod cum bonum sit in Deo sicut in prima causa omnium non univoca, quod sit in eo excellentissimo modo. Et propter hoc dicitur summum bonum.
6 Reply to Objection 1: The supreme good does not add to good any absolute thing, but only a relation. Now a relation of God to creatures, is not a reality in God, but in the creature; for it is in God in our idea only: as, what is knowable is so called with relation to knowledge, not that it depends on knowledge, but because knowledge depends on it. Thus it is not necessary that there should be composition in the supreme good, but only that other things are deficient in comparison with it.
6 Ad primum ergo dicendum quod summum bonum addit super bonum, non rem aliquam absolutam, sed relationem tantum. Relatio autem qua aliquid de Deo dicitur relative ad creaturas, non est realiter in Deo, sed in creatura; in Deo vero secundum rationem; sicut scibile relative dicitur ad scientiam, non quia ad ipsam referatur, sed quia scientia refertur ad ipsum. Et sic non oportet quod in summo bono sit aliqua compositio, sed solum quod alia deficiant ab ipso.
7 Reply to Objection 2: When we say that good is what all desire, it is not to be understood that every kind of good thing is desired by all; but that whatever is desired has the nature of good. And when it is said, None is good but God alone, this is to be understood of essential goodness, as will be explained in the next article.
7 Ad secundum dicendum quod, cum dicitur bonum est quod omnia appetunt, non sic intelligitur quasi unumquodque bonum ab omnibus appetatur, sed quia quidquid appetitur, rationem boni habet. Quod autem dicitur, nemo bonus nisi solus Deus, intelligitur de bono per essentiam, ut post dicetur.
8 Reply to Objection 3: Things not of the same genus are in no way comparable to each other if indeed they are in different genera. Now we say that God is not in the same genus with other good things; not that He is any other genus, but that He is outside genus, and is the principle of every genus; and thus He is compared to others by excess, and it is this kind of comparison the supreme good implies.
8 Ad tertium dicendum quod ea quae non sunt in eodem genere, si quidem sint in diversis generibus contenta, nullo modo comparabilia sunt. De Deo autem negatur esse in eodem genere cum aliis bonis, non quod ipse sit in quodam alio genere; sed quia ipse est extra genus, et principium omnis generis. Et sic comparatur ad alia per excessum. Et huiusmodi comparationem importat summum bonum.