sine delirio it has lost bridle and bit altogether, and shows now most distinctly its original nature, and that the intellect is as different from it as the bridle from the horse. In this condition it may also be compared to a clock which, when a certain screw is taken away, runs down without stopping.
Thus this consideration also shows us the will as that which is original, and therefore metaphysical; the intellect, on the other hand, as something subordinate and physical. For as such the latter is, like everything physical, subject to vis inertiæ, consequently only active if it is set agoing by something else, the will, which rules it, manages it, rouses it to effort, in short, imparts to it the activity which does not originally reside in it. Therefore it willingly rests whenever it is permitted to do so, often declares itself lazy and disinclined to activity; through continued effort it becomes weary to the point of complete stupefaction, is exhausted, like the voltaic pile, through repeated shocks. Hence all continuous mental work demands pauses and rest, otherwise stupidity and incapacity ensue, at first of course only temporarily; but if this rest is persistently denied to the intellect it will become excessively and continuously fatigued, and the consequence is a permanent deterioration of it, which in an old man may pass into complete incapacity, into childishness, imbecility, and madness. It is not to be attributed to age in and for itself, but to long-continued tyrannical overexertion of the intellect or brain, if this misfortune appears in the last years of life. This is the explanation of the fact that Swift became mad, Kant became childish, Walter Scott, and also Wordsworth, Southey, and many minorum gentium, became dull and incapable. Goethe remained to the end clear, strong, and active-minded, because he, who was always a man of the world and a courtier, never carried on his mental occupations with self-compulsion. The same holds good of Wieland and of Kuebel, who lived to the age of ninety-one, and also
