We must, first of all, and in a general way, remark of Stoicism, as also of Epicureanism, that they came in the place of the philosophy of the Cynics and Cyrenaics as their counterpart, just as Scepticism took the place of the Academy. But in adopting the principle of these philosophies, they at the same time perfected it and elevated it more into the form of scientific thought. Yet because in them, just as in the others, the content is a fixed and definite one, since self-consciousness therein sets itself apart, this circumstance really puts an end to speculation, which knows nothing of any such rigidity, which rather abolishes it and treats the object as absolute Notion, as in its difference an unseparated whole. Hence with the Stoics, as also really with the Epicureans, instead of genuine speculation, we only meet with an application of the one-sided, limited principle, and thus we require in both to enter merely upon a general view of their principle. Now if Cynicism made reality for consciousness the fact of being immediately natural (where immediate naturalness was the simplicity of the individual, so that he is independent and, in the manifold movement of desire, of enjoyment, of holding many things to be reality, and of working for the same, really keeps up the external simple life) the Stoic elevation of this simplicity into thought consists in the assertion, not that immediate naturalness and spontaneity is the content and the form of the true Being of consciousness, but that the rationality of nature is grasped through thought, so that everything is true or good in the simplicity of thought. But while with Aristotle what underlies everything is the absolute Idea as unlimited and not set forth in a determinate character and with a difference—and its deficiency is only the deficiency which is present in realization, the not being united into one Notion—here the one Notion is undoubtedly set forth as real existence, and everything is related to it, and hence the requisite relation is undoubtedly present; but that in which everything is one is not the true. With Aristotle each conception is considered absolutely in its determination and as separate from any other; here the conception certainly is in this relation and is not absolute, but at the same time it is not in and for itself. Because thus the individual is not considered absolutely but only relatively, the whole working out is not interesting, for it is only an external relation. Likewise with Aristotle the individual only is taken into consideration, but this consideration is lost sight of by the speculative treatment adopted: here, however, the individual is taken up and the treatment is likewise external. This relation is not even consistent, if, as also happens, something such as nature is considered in itself; for the absolute falls outside of it, since its consideration is only a system of reasoning from indeterminate principles, or from principles which are only the first that come to hand.
As a contribution to the history of the philosophy of the Stoics, we first of all desire to mention the more eminent Stoics. The founder of the Stoic School is Zeno (who must be distinguished from the Eleatic); he belonged to Cittium, a town in Cyprus, and was born about the 109th Olympiad. His father was a merchant who, from his business visits to Athens, then, and for long afterwards, the home of Philosophy and of a large number of philosophers, brought with him books, particularly those of the Socratics, whereby a love and craving for knowledge was awakened in his son. Zeno himself travelled to Athens, and, according to some, he found a further motive to live for Philosophy, in that he lost all his possessions by a shipwreck. What he did not lose was the cultured nobility of his mind and his love of rational understanding. Zeno visited several sections of the Socratics, and particularly Xenocrates, a man belonging to the Platonic School, who, on account of the strictness of his morality and the austerity of his whole demeanour, was very celebrated. Thus he underwent the same ordeals as those to which the holy Francis of Assisi subjected himself, and succumbed to them just as little. This may be seen by the fact that while no testimony was given without oath in Athens, the oath was in his case dispensed with, and his simple word believed—and his teacher Plato is said often to have remarked to him that he might sacrifice to the Graces. Then Zeno also visited Stilpo, a Megaric, whom we already know about (Vol. I. p. 464), and with whom he studied dialectic for ten years. Philosophy was considered as the business of his life, and of his whole life, and not studied as it is by a student who hurries through his lectures on Philosophy in order to hasten on to something else. But although Zeno principally cultivated dialectic and practical philosophy, he did not, like other Socratics, neglect physical philosophy, for he studied very specially Heraclitus’ work on Nature, and finally came forward as an independent teacher in a porch called Poecile (στοὰ ποικίλη), which was decorated with the paintings of Polygnotus. From this his school received the name of Stoic. Like Aristotle his principal endeavour was to unite Philosophy into one whole. As his method was characterized by special dialectic skill and training, and by the acuteness of his argumentation, so he himself was distinguished, in respect of his personality, by stern morality, which resembles somewhat that of the Cynics, though he did not, like the Cynics, try to attract attention. Hence with less vanity his temperance in the satisfaction of his absolute wants was almost as great, for he lived on nothing but water, bread, figs and honey. Thus amongst his contemporaries Zeno was accorded general respect; even King Antigonus of Macedonia often visited him and dined with him, and he invited him to come to him in a letter quoted by Diogenes: this invitation, however, Zeno in his reply refused, because he was now eighty years of age. But the circumstance that the Athenians trusted to him the key of their fortress, speaks for the greatness of their confidence in him; indeed, according to Diogenes, the following resolution was passed at a meeting of the people: “Because Zeno, the son of Mnaseas, has lived for many years in our town as a philosopher, and, for the rest, has proved himself to be a good man, and has kept the youths who followed him in paths of virtue and of temperance, having led the way thereto with his own excellent example, the citizens decide to confer on him a public eulogy, and to present him with a golden crown, on account both of his virtue and his temperance. In addition to this he shall be publicly buried in the Ceramicus. And for the crown and the building of the tomb, a commission of five men shall be appointed.” Zeno flourished about the 120th Olympiad (about 300 B.C.) at the same time as Epicurus, Arcesilaus of the New Academy, and others. He died at a great age, being ninety-eight years of age (though some say he was only seventy-two), in the 129th Olympiad; for being tired of life, he put an end to it himself either by strangulation or by starvation—just because he had broken his toe.[121]
Amongst the succeeding Stoics Cleanthes must be specially singled out; he was a disciple and the successor of Zeno in the Stoa, and author of a celebrated Hymn to God, which Stobæus has preserved. He is well known by an anecdote told respecting him. It is said that he was called in accordance with the law before a court of justice in Athens to give an account of the means by which he maintained himself. He then proved that at night he carried water for a gardener, and by means of this occupation, earned as much as he required in order in the day to be in Zeno’s company—as to which the only point which is not quite comprehensible to us is how, even in such a way, philosophy, of all things, could be studied. And when for this a gratuity was voted to him from the public treasury, he refused it at Zeno’s instigation. Like his teacher, Cleanthes also died voluntarily, in his eighty-first year, by abstaining from food.[122]
Of the later Stoics there were many more who could be named as having been famous. More distinguished in science than Cleanthes was his disciple, Chrysippus of Cilicia, born Ol. 125, 1 (474 A.U.C.; 280 B.C.), who likewise lived in Athens, and who was specially active in promoting the wide cultivation and extension of the philosophy of the Stoics. His logic and dialectic were what contributed most largely to his fame, and hence it was said that if the gods made use of dialectic, they would use none other than that of Chrysippus. His literary activity is likewise admired, for the number of his works, as Diogenes Laërtius tells us, amounted to seven hundred and five. It is said of him in this regard that he wrote five hundred lines every day. But the manner in which his writings were composed detracts very much from our wonder at this facility in writing, and shows that most of his works consisted of compilations and repetitions. He often wrote over again respecting the very same thing; whatever occurred to him he put down on paper, dragging in a great variety of evidence. Thus he quoted almost entire books by other writers; and someone gave expression to the belief that if all that belonged to others were taken away from his books, only white paper would be left. But of course it is not so bad as all this, as we may see by all the quotations from the Stoics, where the name of Chrysippus is placed at the head, as it always is, and his conclusions and explanations are used by preference. His writings, of which Diogenes Laërtius mentions a long list, have, however, all been lost to us; so much is nevertheless correct, that he was the main constructor of the Stoic logic. While it is to be regretted that some of his best works have not come down to us, it is, perhaps, a good thing that all are not preserved; if we had to choose between having all or none, the decision would be a hard one. He died in the 143rd Olympiad (212 B.C.).[123]
In the period immediately following, Diogenes of Seleucia in Babylonia is a distinguished figure; Carneades, the celebrated Academic, is said to have learned dialectic from him, and he is also noteworthy because with this Carneades and Critolaus, a Peripatetic thinker, in Olympiad 156, 2 (598 A.U.C., or 156 B.C.) and in the time of the elder Cato, he was sent as Athenian ambassador to Rome—an embassy which first caused the Romans to make acquaintance with Greek philosophy, dialectic and rhetoric, in Rome itself. For those philosophers there gave lectures and discourses.[124]
Besides these, Panaetius is well known as having been Cicero’s instructor; the latter wrote his treatise, De Officiis, after Panaetius. Finally, we have Posidonius, another equally famous teacher, who lived for long in Rome in the time of Cicero.[125]
Later on we see the philosophy of the Stoics pass over to the Romans, that is to say, it became the philosophy of many Romans, though this philosophy did not gain anything as a science by so doing. On the contrary, as in the case of Seneca and the later Stoics, in Epictetus or Antoninus, all speculative interest was really lost, and a rhetorical and hortatory disposition shown, of which mention cannot be made in a history of Philosophy any more than of our sermons. Epictetus of Hierapolis in Phrygia, born at the end of the first century after Christ, was first of all the slave of Epaphroditus, who, however, freed him, after which he betook himself to Rome. When Domitian banished the philosophers, poisoners and astrologers from Rome (94 A.D.), Epictetus went to Nicopolis, in Epirus, and taught there publicly. From his lectures Arrian compiled the voluminous Dissertationes Epicteteæ, which we still possess, and also the manual ἐγχειρίδιον of Stoicism.[126] We still have the Meditations εἰς ἑαυτόν of the Emperor Marcus Aurelius Antoninus, in twelve books; he first of all ruled along with Lucius Aurelius Verus from 161 to 169 A.D., and then from 169 to 180 alone and he conducted a war with the Marcomanni. In his Meditations he always speaks to himself; these reflections are not, however, speculative in nature, being admonitions, such as that man should exercise himself in every virtue.
We have no other original works by the older Stoics. For the Stoic Philosophy, too, the sources on which we formerly could count are cut off. The sources from which a knowledge of the philosophy of the Stoics is to be derived are, however, well known. There is Cicero, who was himself a Stoic, though in his representation there is great difficulty in discovering how, for instance, the principle of Stoic morality is to be distinguished from that which constitutes the principle of the morality of the Peripatetics. And, more particularly, we have Sextus Empiricus, whose treatment is mainly theoretic, and is thus interesting from a philosophic point of view. For Scepticism has had to do with Stoicism more especially. But also Seneca, Antoninus, Arrian, the manual of Epictetus, and Diogenes Laërtius must really be called into council.
As regards the philosophy of the Stoics themselves, they definitely separated it into those three parts which we have already met with (Vol. I. p. 387, Vol. II. pp. 48, 49), and which will, generally speaking, be always found. There is Logic in the first place; secondly, Physics, or Natural Philosophy; and thirdly, Ethics, or the Philosophy of Mind, on the practical side especially. The content of their philosophy has, however, not much that is original or productive.