as such, though the past acts upon it through the medium of custom, so that, for example, the dog recognises its former master even after years, that is to say, it receives the wonted impression at the sight of him; but of the time that has passed since it saw him it has no recollection. The madman, on the other hand, always carries about in his reason an abstract past, but it is a false past, which exists only for him, and that either constantly, or only for the moment. The influence of this false past prevents the use of the true knowledge of the present which the brute is able to make. The fact that violent mental suffering or unexpected and terrible calamities should often produce madness, I explain in the following manner. All such suffering is as an actual event confined to the present. It is thus merely transitory, and is consequently never excessively heavy; it only becomes unendurably great when it is lasting pain; but as such it exists only in thought, and therefore lies in the _memory_. If now such a sorrow, such painful knowledge or reflection, is so bitter that it becomes altogether unbearable, and the individual is prostrated under it, then, terrified Nature seizes upon _madness_ as the last resource of life; the mind so fearfully tortured at once destroys the thread of its memory, fills up the gaps with fictions, and thus seeks refuge in madness from the mental suffering that exceeds its strength, just as we cut off a mortified limb and replace it with a wooden one. The distracted Ajax, King Lear, and Ophelia may be taken as examples; for the creations of true genius, to which alone we can refer here, as universally known, are equal in truth to real persons; besides, in this case, frequent actual experience shows the same thing. A faint analogy of this kind of transition from pain to madness is to be found in the way in which all of us often seek, as it were mechanically, to drive away a painful thought that suddenly occurs to us by some loud exclamation or quick movement—to turn ourselves from it, to distract our minds by force.