Also Sprach Zarathustra: Nobody will very readily regard a doctrine as true merely because it makes people happy or virtuous - excepting, perhaps, the amiable 'Idealists', who are enthusiastic about the good, true, and beautiful, and let all kinds of motley, coarse, and good-natured desirabilities swim about promiscuously in their pond. Happiness and virtue are no arguments. It is willingly forgotten, however, even on the part of thoughtful minds, that to make unhappy and to make bad are just as little counter-arguments. A thing could be true, although it were in the highest degree injurious and dangerous; indeed, the fundamental constitution of existence might be such that one succumbed by a full knowledge of it - so that the strength of a mind might be measured by the amount of 'truth' it could endure - or to speak more plainly, by the extent to which it required truth attenuated, veiled, sweetened, damped, and falsified.