Response to principle (2a)
Grisez takes his first premise, (2a) the ultimate end leaves nothing more to be desired, directly from Thomas.
i Grisez references question one, article five of the treatise on happiness to support his claim that Thomas holds this principle. Throughout the rest of his article, Grisez then treats this principle without qualifying what is meant by desire. As Grisez presents the principle, “Thomas argues that it is necessary that human beings’ ultimate end so fulfill their whole desire (appetitum) that nothing more remains to be desired.”
ii Without any qualifications, it would appear that if any objects of appetitum remain unattained, then desire remains. But desire is not a flat or shallow concept for Aquinas, and happiness is not essentially a fulfillment of desire simpliciter.
Near the end of the treatise on man in the first part of the Summa, Thomas discusses the class of appetitive powers. (I.80) In the second article he asks Whether the sensitive and intellectual appetites are distinct powers? From a consideration of the need for a mover (the apprehended object) to fit the moved (the appetite), Thomas concludes that they are in fact distinct powers. Since goodness is grasped and desirable not just in concrete particulars (the object of sense) but in general and immaterial perfections, the intellectual appetite must be distinct from the sensitive (I.81.2.ad 2). The question remains, When Thomas speaks of appetite and desire in the treatise on happiness, to what is he referring?
A survey of his usage of (2a) will answer this question. Grisez references the first use of (2a) in the treatise, where Thomas does not qualify the desiring appetite. This lack of qualification is not surprising, given its place in the treatise. Thomas’s method is often to begin with the general and then to specify through argument. Thus it will be instructive for us to visit his subsequent uses of (2a).
The second appearance of (2a) occurs in question two. In article seven, Thomas asks Whether man’s happiness lies in a good quality of the soul? Arguing that on the side of the thing possessed our ultimate end cannot be in a quality of the soul, Thomas says, “For the good which is the ultimate end is complete and fulfills desire (appetitum). Human desire (appetites autem humanus) or will (voluntas) is for unrestricted good, whereas a psychological entity is a derivative and therefore a particular good.” (I-II.2.7) Clearly, Thomas thinks that the ultimate end fulfills our will, which Thomas calls the rational appetite (I-II.1.2) Again, in the next article, Thomas uses (2a) to argue against a created good being our ultimate end. And again, Thomas clearly considers the desire being fulfilled the rational appetite,
For man to rest content with any created good is not possible, for he can be happy only with complete good which satisfies his desire (appetitum) altogether: he would not have reached his ultimate end were there something still remaining to be desired (appetendum). The object of the will (voluntatus), that is the human appetite (appetites humanus), is the Good without reserve, just as the object of the mind is the True without reserve. Clearly, then, nothing can satisfy man’s will (voluntatem) except such goodness, which is found, not in anything created, but in God alone. (I-II.2.8)
Thomas considers the ultimate end to be the fulfillment of the human appetite or will.
Following this are two uses of (2a) where Thomas does not qualify the appetite as the rational appetite. In I-II.3.8 Thomas argues that complete happiness can only lie in the vision of God. Since through God’s effects, we know that He is but cannot grasp the cause, we will desire to grasp this cause until we have the vision of God. But, “man is not perfectly happy so long as something remains for him to desire and seek (desiderandum et quƦrendum).” Thus, only with the vision of God can man be perfectly happy.
Thomas next uses (2a) to argue that happiness cannot be attained in this life. We are subject to many different evils in this life and cannot fulfill our desire to guarantee the security of any happiness we do attain. But, “the general notion of happiness, of goodness perfect and sufficient, implies that every ill is banished and every desire (desiderium) fulfilled.” (I-II.5.3) Thus, beatitude cannot be attained in this life.
The last use of (2a) occurs in the last article of the treatise. Thomas asks Whether every human being desires (appetat) happiness? He answers that when beatitude is taken in its general or abstract meaning, everybody wishes (vult) for happiness. “For it signifies, as we have said, complete goodness. Since the good is the object of the will (voluntatis), the perfect good is that which satisfies it altogether. To desire (appetere) to be happy is nothing else than to wish (apetere) for this satisfaction. And each and everyone wishes.” (I-II.5.8) The complete goodness that satisfies our desire is taken to be the object that satisfies our will or rational appetite. Together, these passages offer strong support that when Thomas speaks of the ultimate end satisfying man’s desire, he is speaking primarily of our rational appetite.
Two further arguments can be offered for this conclusion. First, that Thomas considers beatitude to lie in the intellectual vision of God, an activity that does not depend on the body. Without the body there is no sensitive appetite. Thus, the appetite being satisfied (at least primarily) is the rational appetite.
Second, Thomas argues that sensitive activity does not enter into the essence of happiness. The union that is the essence of happiness cannot be achieved on the sense level. But sensitive activity does enter into beatitude as an antecedent and a consequent. Insofar as we enjoy happiness in this life, sensation is a prerequisite for understanding and so an antecedent to happiness. Sensitive activity is a consequent to beatitude in that when the soul is reembodied, its delight will overflow into the body, enhancing its activities (I-II.3.3). Yet this is an accidental perfection to happiness, or a perfection according to the well-being of happiness. The essence of happiness is therefore not affected by the body’s absence, allowing the disembodied soul to attain the essence of happiness. Thus it is possible that sensitive appetites not be completely fulfilled without happiness being lost, for the sensitive appetites are not even present in the disembodied person.
In conclusion, there is sufficient evidence to conclude that when Thomas uses (2a) he is speaking of the fulfillment of the rational appetite and not desire in general, although these other appetites do enter into happiness. Thus, for the essence of happiness to be complete, it is sufficient for the rational appetite to be at rest in its object. The next section will show that, according to Thomas’s anthropology and theology, the rational appetite is at rest in its object in the beatific vision.
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i.For the sake of simplicity, I will use (2a) to refer to “the ultimate end leaves nothing more to be desired” instead of the original formulation “According to Thomas, the ultimate end leaves nothing more to be desire,” while looking at Thomas.
ii.Grisez, 39.