[Footnote 1: _Translator's Note_. The work to which Schopenhauer here refers is a series of essays by Cabanis, a French philosopher (1757-1808), treating of mental and moral phenomena on a physiological basis. In his later days, Cabanis completely abandoned his materialistic standpoint.]
Through neglect of this rule, many men of genius and great scholars have become weak-minded and childish, or even gone quite mad, as they grew old. To take no other instances, there can be no doubt that the celebrated English poets of the early part of this century, Scott, Wordsworth, Southey, became intellectually dull and incapable towards the end of their days, nay, soon after passing their sixtieth year; and that their imbecility can be traced to the fact that, at that period of life, they were all led on? by the promise of high pay, to treat literature as a trade and to write for money. This seduced them into an unnatural abuse of their intellectual powers; and a man who puts his Pegasus into harness, and urges on his Muse with the whip, will have to pay a penalty similar to that which is exacted by the abuse of other kinds of power.
And even in the case of Kant, I suspect that the second childhood of his last four years was due to overwork in later life, and after he had succeeded in becoming a famous man.
Every month of the year has its own peculiar and direct influence upon health and bodily condition generally; nay, even upon the state of the mind. It is an influence dependent upon the weather.
In making his way through life, a man will find it useful to be ready and able to do two things: to look ahead and to overlook: the one will protect him from loss and injury, the other from disputes and squabbles.
No one who has to live amongst men should absolutely discard any person who has his due place in the order of nature, even though he is very wicked or contemptible or ridiculous. He must accept him as an unalterable fact--unalterable, because the necessary outcome of an eternal, fundamental principle; and in bad cases he should remember the words of Mephistopheles: _es muss auch solche Käuze geben[1]_--there must be fools and rogues in the world. If he acts otherwise, he will be committing an injustice, and giving a challenge of life and death to the man he discards. No one can alter his own peculiar individuality, his moral character, his intellectual capacity, his temperament or physique; and if we go so far as to condemn a man from every point of view, there will be nothing left him but to engage us in deadly conflict; for we are practically allowing him the right to exist only on condition that he becomes another man--which is impossible; his nature forbids it.