προϕέρει τὸπονηρόν._[8] (Cf. _Matthew_ xii. 35.) But it was Kant who first completely cleared up this important point through his profound doctrine of the =empirical= and =intelligible=[9] character. He showed that the empirical character, which manifests itself in time and in multiplicity of action, is a phaenomenon; while the reality behind it is the intelligible character, which, being the essential constitution of the Thing in itself underlying the phaenomenon, is independent of time, space, plurality, and change. In this way alone can be explained what is so astonishing, and yet so well known to all who have learnt life's lessons,--the fixed unchangeableness of human character. There are certain ethical writers, whose aim is the moral improvement of men, and who talk of progress made in the path of virtue; but their assurances are always met and victoriously confuted by the irrefragable facts of experience, which prove that virtue is nature's work and cannot be inculcated. The character is an original datum, immutable, and incapable of any amelioration through correction by the intellect. Now, were this not so; and further: if (as the above-mentioned dull-headed preachers maintain) an improvement of the character, and hence "a constant advance towards the good" were possible by means of moral instruction; then, unless we are prepared to suppose that all the various religious institutions, and all the efforts of the moralists fail in their purpose, we should certainly expect to find that the older half of mankind, at least on an average, is distinctly better than the younger. This, however, is so far from being the case, that it is not to the old, who have, as we see, grown worse by experience, but to the young that we look for something good. It may happen that in his old age one man appears somewhat better, another worse, than he was in his youth. But the reason is not far to seek. It is simply because with length of days the intelligence by constant correction becomes riper, and hence the character stands out in purer and clearer shape; while early life is a prey to ignorance, mistakes, and chimeras, which now present false motives, and now veil the real. For a fuller explanation I would refer the reader to the principles laid down in Chapter III. of the preceding Essay, on "The Freedom of the Will."[10] It is true that among convicts the young have a large majority; but this is because, when a tendency to crime exists in the character, it soon finds a way of expressing itself in acts, and of reaching its goal--the galleys, or the gibbet; while he, whom all the inducements to wrong doing, which a long life offers, have failed to lead astray, is not likely to fall at the eleventh hour. Hence the respect paid to age is, in my opinion, due to the fact that the old are considered to have passed through a test of sixty or seventy years, and kept their integrity unsullied; for this of course is the _sine qua non_ of the honour accorded them.