It is probable that the objects of religious, moral, æsthetic and logical sentiment likewise belong only to the surface of things, while man willingly believes that here, at least, he has touched the heart of the world.... 1, 17 Nothing could be said of the metaphysical world but that it would be a different condition, a condition inaccessible and incomprehensible to us; it would be a thing of negative qualities. Were the existence of such a world ever so well proved, the fact would nevertheless remain that it would be precisely the most irrelevant of all forms of knowledge.... 1, 21-22 Belief in the freedom of the will is an original error of everything organic, as old as the existence of the awakenings of logic in it; the belief in unconditioned substances and similar things is equally a primordial as well as an old error of everything organic. 1, 33 A degree of culture, and assuredly a very high one, is attained when man rises above superstitious and religious notions and fears, and, for instance, no longer believes in guardian angels or in original sin, and has also ceased to talk of the salvation of his soul,--if he has attained to this degree of freedom, he has still also to overcome metaphysics with the greatest exertion of his intelligence. 1, 35 Away with those wearisomely hackneyed terms Optimism and Pessimism!... We must get rid of both the calumniating and the glorifying conception of the world. 1, 43-44 _Error_ has made man so deep, sensitive, and inventive that he has put forth such blossoms as religions and arts. Pure knowledge could not have been capable of it. 1, 44-45 The usual false conclusions of mankind are these: a thing exists, therefore it has a right to exist. Here there is inference from the ability to live to its suitability; from its suitability to its rightfulness. Then: an opinion brings happiness; therefore it is the true opinion. Its effect is good; therefore it is itself good and true. 1, 45 Every belief in the value and worthiness of life is based on vitiated thought; it is only possible through the fact that sympathy for the general life and suffering of mankind is very weakly developed in the individual. 1, 47-48 Science ... has no consideration for ultimate purposes, any more than Nature has, but just as the latter occasionally achieves things of the greatest suitableness without intending to do so, so also true science, as the _imitator of nature in ideas,_ will occasionally and in many ways further the usefulness and welfare of man,--_but also without intending to do so._ 1, 58 All single actions are called good or bad without any regard to their motives, but only on account of the useful or injurious consequences which result for the community. But soon the origin of these distinctions is forgotten, and it is deemed that the qualities "good" or "bad" are contained in the action itself without regard to its consequences.... 1, 59