1. With regard to the first point, that a work of art is a product of human activity, an inference has been drawn from this (_a_) that such an activity, being the conscious production of an external object can also be _known_ and _divulged_, and learned and reproduced by others. For that which one is able to effect, another--such is the notion--is able to effect or to imitate[41], when he has once simply mastered the way of doing it. In short we have merely to assume an acquaintance with the rules of art-production universally shared, and anybody may then, if he cares to do so, give effect to executive ability of the same type, and produce works of art. It is out of reasoning of this kind that the above-mentioned theories, with their provision of rules, and their prescriptions formulated for practical acceptance, have arisen. Unfortunately that which is capable of being brought into effect in accordance with suggestions of this description can only be something formally regular and mechanical. For only that which is mechanical is of so exterior a type that only an entirely empty effort of will and dexterity is required to accept it among our working conceptions, and forthwith to carry it out; an effort, in fact, which is not under the necessity to contribute out of its own resources anything concrete such as is quite outside the prescriptive power of such general rules. This is apparent with most vividness when precepts of this kind are not limited to what is purely external and mechanical, but extend their pretensions to the activity of the artist in the sense that implies wealth of significance and intelligence. In this field our rules pass off to purely indefinite generalities, such as "the theme ought to be interesting, and each individual person must speak as is appropriate to his status, age, sex and situation." But if rules are really to suffice for such a purpose their directions ought to be formulated with such directness of detail that, without any further co-operation of mind, they could be executed precisely in the manner they are prescribed. Such rules being, in respect to this content, abstract, clearly and entirely fall short of their pretension of being able to complete[42] the artistic consciousness. Artistic production is not a formal activity in accordance with a series of definitions; it is, as an activity of soul, constrained to work out of its own wealth, and to bring before the mind's eye a wholly other and far richer content, and a more embracing and unique[43] creation than ever can be thus prescribed. In particular cases such rules may prove, of assistance, in so far, that is, as they contain something really definite and consequently useful for practice. But even here their guidance will only apply to conditions wholly external.