Overagainst the simplicity of the celestial world we have [[118]]the sublunary kingdom of the four natures,—the kingdom of contrasts and of change. Even in this realm, in the midst of its plurality, we meet with the unity of an ascending series, from the Elements up to Man. Farabi is unable to advance much that is original on this subject. True to his logical standpoint, he gives himself very little concern about the Natural Sciences, among which, in reliance upon the original unity of matter, he seems without any hesitation to have counted Alchemy. We turn at once to his Doctrine of Man or of the Human Soul, which presents a measure of interest.
9. The powers or divisions of the Human Soul are, in Farabi’s opinion, not of co-ordinate rank, but constitute an ascending series. The lower faculty is Material for the higher; and this again is the Form for the first, while the highest power of all, viz. Thinking, is non-material, and is Form for all the Forms which precede. The life of the Soul is raised from things of sense to thought, by means of the power of Representation; but in all the faculties there is involved Effort or Will. Every theory has its obverse side in practice; and Inclination and Disinclination are inseparable from the perceptions furnished by the senses. To the representations of these the soul takes up an attitude of assent or dissent, by affirming or denying. Finally, Thought passes judgment on Good and Bad, gives to the Will its motives, and constructs Art and Science. All Perception, Representation or Thought is attended with a certain effort to reach the necessary consequence, just as warmth radiates from the substance of fire.
The Soul is that which gives completeness (Entelechia) to the existence of the body; but that which gives completeness [[119]]to the existence of the Soul is the Mind, or the Spirit (ʻaql). The Spirit only is the real Man.
10. Accordingly the discussion turns mainly on the Mind or Spirit. In the human Spirit everything earthly is raised to a higher mode of existence, which is lifted out of the categories of the Corporeal. Now as a capability or potentiality, Mind or Spirit is present in the Soul of the Child; and it becomes actual Spirit in the course of its apprehension of bodily forms in experience by means of the Senses and the representative faculty. But this transition from possibility to actuality,—the realisation thus of experience,—is not Man’s own act, but is brought about by the Superhuman Spirit, which has sprung from the last Sphere-Spirit, that of the Moon. In this way Man’s knowledge is represented as being a contribution from above, and not a knowledge which has been acquired in mental struggle. In the light of the Spirit which stands above us, our understanding descries the Forms of the Corporeal; and thereby experience is amplified into rational knowledge. Experience, in fact, takes in only the Forms which have been abstracted from the world of Matter. But there are in existence also,—before and above material things,—Forms and general entities, in the pure Spirits of the Spheres. Man now receives information from these ‘detached Forms’: it is only by means of their influence that his actual experience becomes explicable to him. From God down to the Spirit of Mankind, the higher Form affects only that which immediately succeeds it. Every intermediate Form stands in a relation of ‘receptive’ activity to what is above it, and of ‘conferring’ activity to what is below it. In its relation to the Human Spirit, which is influenced from above (ʻaql mustafad), [[120]]the Superhuman Spirit, produced from the last Sphere-Spirit, is to be called ‘active’ or ‘creative’ (ʻaql faʻʻâl). Yet it is not continually active, because its effectiveness is restrained by its material. But God is the completely-real, eternally-active Spirit.
The Spirit in Man is threefold: according as it is (1) Possible, (2) Actual, and (3) Influenced from above. Now in the sense of Farabi, this means—that (1) the spiritual potentiality in Man is, by means of (2) realizing the knowledge which is gained by experience, (3) led to the knowledge of the Supersensible, which precedes all experience, and itself induces the experience.
The grades of Spirit and its knowledge correspond to the grades of existence. The lower strives wistfully to reach the higher, and the higher lifts the lower up to its own level. The Spirit which stands above us, and which has lent to all earthly things their Forms, seeks to bring these scattered Forms together that they may become one in love. First of all he collects them in Man. And indeed the possibility and truth of human knowledge depend on the fact that the same Spirit who bestowed upon the Corporeal its figure, also gives Idea to Man. The scattered Forms of the earthly are found again in the Human Spirit, and thereby it comes to resemble the last of the Celestial Spirits. Unity with that Celestial Spirit,—and in this an approach to God,—is the aim and the blessedness of the Spirit of Man.
Now the question whether such a union is possible before Man’s death is, in Farabi’s opinion, either a doubtful one, or one which should be answered in the direct negative. The highest thing that can be attained in this life, is [[121]]rational knowledge. But separation from the body gives to the rational soul the complete freedom which belongs to spirit. But does it then continue to exist as an individual soul? Or is it merely a Moment of the higher World-Intelligence? On this point Farabi expresses himself ambiguously, and with a lack of consistency, in his various writings. Men,—so the expression runs,—disappear in death; one generation follows another; and like is joined to like, each in its own class. And forasmuch as rational souls are not bound to space, they multiply without end, just as thought is added to thought, and power to power. Every soul reflects on itself and all others that are like to it; and the more it so reflects, the more intense is its joy (Cf. [infra, § 13]).
11. We come now to Farabi’s practical philosophy. In his Ethics and Politics we are brought into a somewhat closer relation to the life and belief of the Muslims. One or two general points of view may be brought forward.
Just as Logic has to give an account of the principles of knowledge, so Ethics have to deal with the fundamental rules of conduct, although, in the latter, somewhat more value is attached to practice and experience than in the theory of knowledge. In the treatment of this subject Farabi agrees sometimes with Plato, and sometimes with Aristotle; but occasionally, in a mystic and ascetic fashion, he goes farther than either of them. In opposition to the Theologians, who recognize, no doubt, a knowledge gained by Reason, but not rules of conduct taught by Reason, Farabi frequently affirms with emphasis that Reason decides whether a thing is good or evil. Why should not that Reason, which has been imparted to us from above, decide upon conduct, [[122]]seeing that the highest virtue certainly consists in knowing? In vigorously accentuated terms Farabi declares that if one man knew everything that stands in the writings of Aristotle, but did not act in accordance with his knowledge, while another man shaped his conduct in accordance with Aristotle’s teaching, without being acquainted with it, the preference would have to be assigned to the former. Knowledge takes a higher position than the moral act; otherwise it could not decide upon the act.
By its very nature the Soul desires. In so far as it perceives and represents, it has a will, just like the lower animals. But man alone possesses freedom of choice, seeing that this rests upon rational consideration. Pure thought is the sphere of freedom. Thus it is a freedom which depends upon motives furnished by thinking,—a freedom which is at the same time necessity, inasmuch as in the last resort it is determined by the rational nature of God. In this sense Farabi is a Determinist.