Thus those incomprehensible characteristics of their nature—all their timidity, vanity, hatefulness, envy, their narrow and narrowing disposition—and that too personal and awkward element in natures like those of Rousseau and Schopenhauer, may very well be the consequences of a periodical attack of heart disease; and this in its turn may be the result of a nervous complaint, and this latter the consequence of ——(16) So long as genius dwells within us we are full of audacity, yea, almost mad, and heedless of health, life, and honour; we fly through the day as free and swift as an eagle, and in the darkness we feel as confident as an owl.—But let genius once leave us and we are instantly overcome by a feeling of the most profound despondency: we can no longer understand ourselves; we suffer from everything that we experience and do not experience; we feel as if we were in the midst of shelterless rocks with the tempest raging round us, and we are at the same time like pitiful childish souls, afraid of a rustle or a shadow.—Three-fourths of all the evil committed in the world is due to timidity; and this is above all a physiological process. 539. DO YOU KNOW WHAT YOU WANT?—Have you never been troubled by the fear that you might not be at all fitted for recognising what is true? by the fear that your senses might be too dull, and even your delicacy of sight far too blunt? If you could only perceive, even once, to what extent your volition dominates your sight! How, for example, you wished yesterday to see more than some one else, while to-day you wish to see it differently! and how from the start you were anxious to see something which would be in conformity with or in opposition to anything that people thought they had observed up to the present. Oh, those shameful cravings! How often you keep your eyes open for what is efficacious, for what is soothing, just because you happen to be tired at the moment! Always full of secret predeterminations of what truth should be like, so that you—you, forsooth!—might accept it! or do you think that to-day, because you are as frozen and dry as a bright winter morning, and because nothing is weighing on your mind, you have better eyesight! Are not ardour and enthusiasm necessary to do justice to the creations of thought?—and this indeed is what is called sight! as if you could treat matters of thought any differently from the manner in which you treat men. In all relations with thought there is the same morality, the same honesty of purpose, the same _arrière-pensée_, the same slackness, the same faint-heartedness—your whole lovable and hateful self! Your physical exhaustion will lend the things pale colours whilst your feverishness will turn them into monsters! Does not your morning show the things in a different light from the evening? Are you not afraid of finding in the cave of all knowledge your own phantom, the veil in which truth is wrapped up and hidden from your