Elements of Physiology, vol. ii. p. 1081, which should be compared with Comte, Philosophie Positive, vol. i. p. 354.
299
I speak of idealists in opposition to sensationalists; though the word idealist is often used by metaphysicians in a very different sense. On the different kinds of idealism, see Kritik der reinen Vernunft, and Prolegomena zu jeder künftigen Metaphysik, in Kant's Werke, vol. ii. pp. 223, 389, vol. iii. pp. 204, 210, 306, 307. According to him, the Cartesian idealism is empirical.
300
Thus, Dugald Stewart (Philosophical Essays, Edin. 1810, p. 33) tells us of ‘the simple idea of personal identity.’ And Reid (Essays on the Powers of the Mind, vol. i. p. 354) says, ‘I know of no ideas or notions that have a better claim to be accounted simple and original than those of space and time.’ In the Sanscrit metaphysics, time is ‘an independent cause.’ See the Vishnu Purana, pp. 10, 216.
301
‘As Space is a comprehensive word, including all positions, or the whole of synchronous order, so Time is a comprehensive word, including all successions, or the whole of successive order.’ Mill's Analysis of the Mind, vol. ii. p. 100; and on the relation of time to memory, vol. i. p. 252. In Jobert's New System of Philosophy, vol. i. p. 33, it is said that ‘time is nothing but the succession of events, and we know events by experience only.’ See also p. 133, and compare respecting time Condillac, Traité des Sensations, pp. 104–114, 222, 223, 331–333. To the same effect is Essay concerning Human Understanding, book ii. chap. xiv., in Locke's Works, vol. i. p. 163; and see his second reply to the Bishop of Worcester, in Works, vol. iii. pp. 414–416; and as to the idea of substance, see vol. i. pp. 285–290, 292, 308, vol. iii. pp. 5, 10, 17.
302
Reid (Essays on the Powers of the Mind, vol. i. p. 281) says, that necessary truths ‘cannot be the conclusions of the senses; for our senses testify only what is, and not what must necessarily be.’ See also vol. ii. pp. 53, 204, 239, 240, 281. The same distinction is peremptorily asserted in Whewell's Philosophy of the Inductive Sciences, 8vo, 1847, vol. i. pp. 60–73, 140; and see Dugald Stewart's Philosophical Essays, pp. 123, 124. Sir W. Hamilton (Additions to Reid's Works, p. 754) says, that non-contingent truths ‘have their converse absolutely incogitable.’ But this learned writer does not mention how we are to know when anything is ‘absolutely incogitable.’ That we cannot cogitate an idea, is certainly no proof of its being incogitable; for it may be cogitated at some later period, when knowledge is more advanced.
303
This is asserted by all the followers of Locke; and one of the latest productions of that school declares, that ‘to say that necessary truths cannot be acquired by experience, is to deny the most clear evidence of our senses and reason.’ Jobert's New System of Philosophy, vol. i. p. 58.
304
To avoid misapprehension, I may repeat, that, here and elsewhere, I mean by metaphysics, that vast body of literature which is constructed on the supposition that the laws of the human mind can be generalized solely from the facts of individual consciousness. For this scheme, the word ‘metaphysics’ is rather inconvenient, but it will cause no confusion if this definition of it is kept in view by the reader.
305
What a celebrated historian of philosophy says of Platonism, is equally true of all the great metaphysical systems: ‘Dass sie ein zusammenhängendes harmonisches Ganzes ausmachen (i. e. the leading propositions of it) fällt in die Augen.’ Tennemann, Geschichte der Philosophie, vol. ii. p. 527. And yet he confesses (vol. iii. p. 52) of it and the opposite system: ‘und wenn man auf die Beweise siehet, so ist der Empirismus des Aristoteles nicht besser begründet als der Rationalismus des Plato.’ Kant admits that there can be only one true system, but is confident that he has discovered what all his predecessors have missed. Die Metaphysik der Sitten, in Kant's Werke, vol. v. p. 5, where he raises the question, ‘ob es wohl mehr, als eine Philosophie geben könne.’ In the Kritik, and in the Prolegomena zujeder künftigen Metaphysik, he says that metaphysics have made no progress, and that the study can hardly be said to exist. Werke, vol. ii. pp. 49, 50, vol. iii. pp. 166, 246.
306
We find a curious instance of this, in the attempt made by M. Cousin to found an eclectic school; for this very able and learned man has been quite unable to avoid the one-sided view which is to every metaphysician an essential preliminary; and he adopts that fundamental distinction between necessary ideas and contingent ideas, by which the idealist is separated from the sensationalist: ‘la grande division des idées aujourd'hui établie est la division des idées contingentes et des idées nécessaires.’ Cousin, Hist. de la Philosophie, II. série, vol. i. p. 82: see also vol. ii. p. 92, and the same work, I. série, vol. i. pp. 249, 267, 268, 311, vol. iii. pp. 51–54. M. Cousin constantly contradicts Locke, and then says he has refuted that profound and vigorous thinker; while he does not even state the arguments of James Mill, who, as a metaphysician, is the greatest of our modern sensationalists, and whose views, whether right or wrong, certainly deserve notice from an eclectic historian of philosophy.
Another eclectic, Sir W. Hamilton, announces (Discussions on Philosophy, p. 597) ‘an undeveloped philosophy, which, I am confident, is founded upon truth. To this confidence I have come, not merely through the convictions of my own consciousness, but by finding in this system a centre and conciliation for the most opposite of philosophical opinions.’ But, at p. 589, he summarily disposes of one of the most important of these philosophical opinions as ‘the superficial edifice of Locke.’
307
Berkeley, in a moment of candour, inadvertently confesses what is very damaging to the reputation of his own pursuits: ‘Upon the whole, I am inclined to think that the far greater part, if not all, of those difficulties which have hitherto amused philosophers, and blocked up the way to knowledge, are entirely owing to ourselves. That we have first raised a dust, and then complain we cannot see.’ Principles of Human Knowledge, in Berkeley's Works, vol. i. p. 74. Every metaphysician and theologian should get this sentence by heart: ‘That we have first raised a dust, and then complain we cannot see.’
308
Some of the laws of association, as stated by Hume and Hartley, are capable of historical verification, which would change the metaphysical hypothesis into a scientific theory. Berkeley's theory of vision, and Brown's theory of touch, have, in the same way, been verified physiologically; so that we now know what otherwise we could only have suspected.
309
In regard to one of the difficulties stated in this chapter as impeding metaphysicians, it is only just to quote the remarks of Kant: ‘Wie aber das Ich, der ich denke, von dem Ich, das sich selbst anschaut, unterschieden (indem ich mir noch andere Anschauungsart wenigstens als möglich vorstellen kann), und doch mit diesem letzteren als dasselbe Subject einerlei sei, wie ich also sagen könne: Ich als Intelligenz und denkend Subject, erkenne mich selbst als gedachtes Object, so fern ich mir noch über das in der Anschauung gegeben bin, nur, gleich anderen Phänomenen, nicht wie ich vor dem Verstande bin, sondern wie ich mir erscheine, hat nicht mehr auch nicht weniger Schwierigkeit bei sich, als wie ich mir selbst überhaupt ein Object und zwar der Anschauung und innerer Wahrnehmungen sein könne.’ Kritik der reinen Vernunft, in Kant's Werke, vol. ii. p. 144. I am very willing to let the question rest on this: for to me it appears that both cases are not only equally difficult, but, in the present state of our knowledge, are equally impossible.
310
Thus we find that the Crusades, by diminishing the proportion of men to women in Europe, increased licentiousness. See a curious passage in Sprengel, Histoire de la Médecine, vol. ii. p. 376. In Yucatan, there is generally a considerable excess of women, and the result is prejudicial to morals. Stephens's Central America,
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