_The Theory of Poisons._--So many things have to be united in order that scientific thinking may arise, and all the necessary powers must have been devised, exercised, and fostered singly! In their isolation, however, they have very often had quite a different effect than at present, when they are confined within the limits of scientific thinking and kept mutually in check:--they have operated as poisons; for example, the doubting impulse, the denying impulse, the waiting impulse, the collecting impulse, the disintegrating impulse. Many hecatombs of men were sacrificed ere these impulses learned to understand their juxtaposition and regard themselves as functions of one organising force in one man! And how far are we still from the point at which the artistic powers and the practical wisdom of life shall co-operate with scientific thinking, so that a higher organic system may be formed, in relation to which the scholar, the physician, the artist, and the lawgiver, as we know them at present, will seem sorry antiquities! 114. _The Extent of the Moral._--We construct a new picture, which we see immediately with the aid of all the old experiences which we have had, _always according to the degree_ of our honesty and justice. The only experiences are moral experiences, even in the domain of sense-perception. 115. _The Four Errors._--Man has been reared by his errors: firstly, he saw himself always imperfect; secondly,-he attributed to himself--imaginary qualities; thirdly, he felt himself in a false position in relation to the animals and nature; fourthly, he always devised new tables of values, and accepted them for a time as eternal and unconditioned, so that at one time this, and at another time that human impulse or state stood first, and was ennobled in consequence. When one has deducted the effect of these four errors, one has also deducted humanity, humaneness, and "human dignity." 116. _Herd-Instinct._--Wherever we meet with a morality we find a valuation and order of rank of the human impulses and activities. These valuations and orders of rank are always the expression of the needs of a community or herd: that which is in the first place to _its_ advantage--and in the second place and third place--is also the authoritative standard for the worth of every individual. By morality the individual is taught to become a function of the herd, and to ascribe to himself value only as a function. As the conditions for the maintenance of one community have been very different from those of another community, there have been very different moralities; and in respect to the future essential transformations of herds and communities, states and societies, one can prophesy that there will still be very divergent moralities. Morality is the herd-instinct in the individual. 117.