15. The doctrine of the immortality of the soul was not new to the Greeks in the age of Socrates, but, like the unity of God, had a foundation in the popular belief. The old Homeric notion of a gibbering ghost flitting away to Hades; or of a few illustrious heroes enjoying the isles of the blest; or of an existence divided between the two; or the Hesiodic, of righteous spirits, who become guardian angels,—had given place in the mysteries and the Orphic poets to representations, partly fanciful, of a future state of rewards and punishments. (Laws.) The reticence of the Greeks on public occasions and in some part of their literature respecting this 'underground' religion, is not to be taken as a measure of the diffusion of such beliefs. If Pericles in the funeral oration is silent on the consolations of immortality, the poet Pindar and the tragedians on the other hand constantly assume the continued existence of the dead in an upper or under world. Darius and Laius are still alive; Antigone will be dear to her brethren after death; the way to the palace of Cronos is found by those who 'have thrice departed from evil.' The tragedy of the Greeks is not 'rounded' by this life, but is deeply set in decrees of fate and mysterious workings of powers beneath the earth. In the caricature of Aristophanes there is also a witness to the common sentiment. The Ionian and Pythagorean philosophies arose, and some new elements were added to the popular belief. The individual must find an expression as well as the world. Either the soul was supposed to exist in the form of a magnet, or of a particle of fire, or of light, or air, or water; or of a number or of a harmony of number; or to be or have, like the stars, a principle of motion (Arist. de Anim.). At length Anaxagoras, hardly distinguishing between life and mind, or between mind human and divine, attained the pure abstraction; and this, like the other abstractions of Greek philosophy, sank deep into the human intelligence. The opposition of the intelligible and the sensible, and of God to the world, supplied an analogy which assisted in the separation of soul and body. If ideas were separable from phenomena, mind was also separable from matter; if the ideas were eternal, the mind that conceived them was eternal too. As the unity of God was more distinctly acknowledged, the conception of the human soul became more developed. The succession, or alternation of life and death, had occurred to Heracleitus. The Eleatic Parmenides had stumbled upon the modern thesis, that 'thought and being are the same.' The Eastern belief in transmigration defined the sense of individuality; and some, like Empedocles, fancied that the blood which they had shed in another state of being was crying against them, and that for thirty thousand years they were to be 'fugitives and vagabonds upon the earth.' The desire of recognizing a lost mother or love or friend in the world below (Phaedo) was a natural feeling which, in that age as well as in every other, has given distinctness to the hope of immortality. Nor were ethical considerations wanting, partly derived from the necessity of punishing the greater sort of criminals, whom no avenging power of this world could reach. The voice of conscience, too, was heard reminding the good man that he was not altogether innocent. (Republic.) To these indistinct longings and fears an expression was given in the mysteries and Orphic poets: a 'heap of books' (Republic), passing under the names of Musaeus and Orpheus in Plato's time, were filled with notions of an under-world.
16. Yet after all the belief in the individuality of the soul after death had but a feeble hold on the Greek mind. Like the personality of God, the personality of man in a future state was not inseparably bound up with the reality of his existence. For the distinction between the personal and impersonal, and also between the divine and human, was far less marked to the Greek than to ourselves. And as Plato readily passes from the notion of the good to that of God, he also passes almost imperceptibly to himself and his reader from the future life of the individual soul to the eternal being of the absolute soul. There has been a clearer statement and a clearer denial of the belief in modern times than is found in early Greek philosophy, and hence the comparative silence on the whole subject which is often remarked in ancient writers, and particularly in Aristotle. For Plato and Aristotle are not further removed in their teaching about the immortality of the soul than they are in their theory of knowledge.
17. Living in an age when logic was beginning to mould human thought, Plato naturally cast his belief in immortality into a logical form. And when we consider how much the doctrine of ideas was also one of words, it is not surprising that he should have fallen into verbal fallacies: early logic is always mistaking the truth of the form for the truth of the matter. It is easy to see that the alternation of opposites is not the same as the generation of them out of each other; and that the generation of them out of each other, which is the first argument in the Phaedo, is at variance with their mutual exclusion of each other, whether in themselves or in us, which is the last. For even if we admit the distinction which he draws between the opposites and the things which have the opposites, still individuals fall under the latter class; and we have to pass out of the region of human hopes and fears to a conception of an abstract soul which is the impersonation of the ideas. Such a conception, which in Plato himself is but half expressed, is unmeaning to us, and relative only to a particular stage in the history of thought. The doctrine of reminiscence is also a fragment of a former world, which has no place in the philosophy of modern times. But Plato had the wonders of psychology just opening to him, and he had not the explanation of them which is supplied by the analysis of language and the history of the human mind. The question, 'Whence come our abstract ideas?' he could only answer by an imaginary hypothesis. Nor is it difficult to see that his crowning argument is purely verbal, and is but the expression of an instinctive confidence put into a logical form:—'The soul is immortal because it contains a principle of imperishableness.' Nor does he himself seem at all to be aware that nothing is added to human knowledge by his 'safe and simple answer,' that beauty is the cause of the beautiful; and that he is merely reasserting the Eleatic being 'divided by the Pythagorean numbers,' against the Heracleitean doctrine of perpetual generation. The answer to the 'very serious question' of generation and destruction is really the denial of them. For this he would substitute, as in the Republic, a system of ideas, tested, not by experience, but by their consequences, and not explained by actual causes, but by a higher, that is, a more general notion. Consistency with themselves is the only test which is to be applied to them. (Republic, and Phaedo.)
18. To deal fairly with such arguments, they should be translated as far as possible into their modern equivalents. 'If the ideas of men are eternal, their souls are eternal, and if not the ideas, then not the souls.' Such an argument stands nearly in the same relation to Plato and his age, as the argument from the existence of God to immortality among ourselves. 'If God exists, then the soul exists after death; and if there is no God, there is no existence of the soul after death.' For the ideas are to his mind the reality, the truth, the principle of permanence, as well as of intelligence and order in the world. When Simmias and Cebes say that they are more strongly persuaded of the existence of ideas than they are of the immortality of the soul, they represent fairly enough the order of thought in Greek philosophy. And we might say in the same way that we are more certain of the existence of God than we are of the immortality of the soul, and are led by the belief in the one to a belief in the other. The parallel, as Socrates would say, is not perfect, but agrees in as far as the mind in either case is regarded as dependent on something above and beyond herself. The analogy may even be pressed a step further: 'We are more certain of our ideas of truth and right than we are of the existence of God, and are led on in the order of thought from one to the other.' Or more correctly: 'The existence of right and truth is the existence of God, and can never for a moment be separated from Him.'
19. The main argument of the Phaedo is derived from the existence of eternal ideas of which the soul is a partaker; the other argument of the alternation of opposites is replaced by this. And there have not been wanting philosophers of the idealist school who have imagined that the doctrine of the immortality of the soul is a theory of knowledge, and that in what has preceded Plato is accommodating himself to the popular belief. Such a view can only be elicited from the Phaedo by what may be termed the transcendental method of interpretation, and is obviously inconsistent with the Gorgias and the Republic. Those who maintain it are immediately compelled to renounce the shadow which they have grasped, as a play of words only. But the truth is, that Plato in his argument for the immortality of the soul has collected many elements of proof or persuasion, ethical and mythological as well as dialectical, which are not easily to be reconciled with one another; and he is as much in earnest about his doctrine of retribution, which is repeated in all his more ethical writings, as about his theory of knowledge. And while we may fairly translate the dialectical into the language of Hegel, and the religious and mythological into the language of Dante or Bunyan, the ethical speaks to us still in the same voice, and appeals to a common feeling.
20. Two arguments of this ethical character occur in the Phaedo. The first may be described as the aspiration of the soul after another state of being. Like the Oriental or Christian mystic, the philosopher is seeking to withdraw from impurities of sense, to leave the world and the things of the world, and to find his higher self. Plato recognizes in these aspirations the foretaste of immortality; as Butler and Addison in modern times have argued, the one from the moral tendencies of mankind, the other from the progress of the soul towards perfection. In using this argument Plato has certainly confused the soul which has left the body, with the soul of the good and wise. (Compare Republic.) Such a confusion was natural, and arose partly out of the antithesis of soul and body. The soul in her own essence, and the soul 'clothed upon' with virtues and graces, were easily interchanged with one another, because on a subject which passes expression the distinctions of language can hardly be maintained.
21. The ethical proof of the immortality of the soul is derived from the necessity of retribution. The wicked would be too well off if their evil deeds came to an end. It is not to be supposed that an Ardiaeus, an Archelaus, an Ismenias could ever have suffered the penalty of their crimes in this world. The manner in which this retribution is accomplished Plato represents under the figures of mythology. Doubtless he felt that it was easier to improve than to invent, and that in religion especially the traditional form was required in order to give verisimilitude to the myth. The myth too is far more probable to that age than to ours, and may fairly be regarded as 'one guess among many' about the nature of the earth, which he cleverly supports by the indications of geology. Not that he insists on the absolute truth of his own particular notions: 'no man of sense will be confident in such matters; but he will be confident that something of the kind is true.' As in other passages (Gorg., Tim., compare Crito), he wins belief for his fictions by the moderation of his statements; he does not, like Dante or Swedenborg, allow himself to be deceived by his own creations.
The Dialogue must be read in the light of the situation. And first of all we are struck by the calmness of the scene. Like the spectators at the time, we cannot pity Socrates; his mien and his language are so noble and fearless. He is the same that he ever was, but milder and gentler, and he has in no degree lost his interest in dialectics; he will not forego the delight of an argument in compliance with the jailer's intimation that he should not heat himself with talking. At such a time he naturally expresses the hope of his life, that he has been a true mystic and not a mere retainer or wand-bearer: and he refers to passages of his personal history. To his old enemies the Comic poets, and to the proceedings on the trial, he alludes playfully; but he vividly remembers the disappointment which he felt in reading the books of Anaxagoras. The return of Xanthippe and his children indicates that the philosopher is not 'made of oak or rock.' Some other traits of his character may be noted; for example, the courteous manner in which he inclines his head to the last objector, or the ironical touch, 'Me already, as the tragic poet would say, the voice of fate calls;' or the depreciation of the arguments with which 'he comforted himself and them;' or his fear of 'misology;' or his references to Homer; or the playful smile with which he 'talks like a book' about greater and less; or the allusion to the possibility of finding another teacher among barbarous races (compare Polit.); or the mysterious reference to another science (mathematics?) of generation and destruction for which he is vainly feeling. There is no change in him; only now he is invested with a sort of sacred character, as the prophet or priest of Apollo the God of the festival, in whose honour he first of all composes a hymn, and then like the swan pours forth his dying lay. Perhaps the extreme elevation of Socrates above his own situation, and the ordinary interests of life (compare his jeu d'esprit about his burial, in which for a moment he puts on the 'Silenus mask'), create in the mind of the reader an impression stronger than could be derived from arguments that such a one has in him 'a principle which does not admit of death.'
The other persons of the Dialogue may be considered under two heads: (1) private friends; (2) the respondents in the argument.
First there is Crito, who has been already introduced to us in the Euthydemus and the Crito; he is the equal in years of Socrates, and stands in quite a different relation to him from his younger disciples. He is a man of the world who is rich and prosperous (compare the jest in the Euthydemus), the best friend of Socrates, who wants to know his commands, in whose presence he talks to his family, and who performs the last duty of closing his eyes. It is observable too that, as in the Euthydemus, Crito shows no aptitude for philosophical discussions. Nor among the friends of Socrates must the jailer be forgotten, who seems to have been introduced by Plato in order to show the impression made by the extraordinary man on the common. The gentle nature of the man is indicated by his weeping at the announcement of his errand and then turning away, and also by the words of Socrates to his disciples: 'How charming the man is! since I have been in prison he has been always coming to me, and is as good as could be to me.' We are reminded too that he has retained this gentle nature amid scenes of death and violence by the contrasts which he draws between the behaviour of Socrates and of others when about to die.