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With all this, so much only is to be said, that though fear first produces gods (demons), it is Reason by means of its moral principles that can first produce the concept of God (even when, as commonly is the case, one is unskilled in the Teleology of nature, or is very doubtful on account of the difficulty of adjusting by a sufficiently established principle its mutually contradictory phenomena). Also, the inner moral purposive destination of man's being supplies that in which natural knowledge is deficient, by directing us to think, for the final purpose of the being of all things (for which no other principle than an ethical one is satisfactory to Reason), the supreme Cause [as endowed] with properties, whereby it is able to subject the whole of nature to that single design (for which nature is merely the instrument),—i.e. to think it as a Deity.
There is a physical Teleology, which gives sufficient ground of proof to our theoretical reflective Judgement to assume the being of an intelligent World-Cause. But we find also in ourselves and still more in the concept of a rational being in general endowed with freedom (of his causality) a moral Teleology. However, as the purposive reference, together with its law, is determined a priori in ourselves and therefore can be cognised as necessary, this internal conformity to law requires no intelligent cause external to us; any more than we need look to a highest Understanding as the source of the purposiveness (for every possible exercise of art) that we find in the geometrical properties of figures. But this moral Teleology concerns us as beings of the world, and therefore as beings bound up with other things in the world; upon which latter, whether as purposes or as objects in respect of which we ourselves are final purpose, the same moral laws require us to pass judgement. This moral Teleology, then, has to do with the reference of our own causality to purposes and even to a final purpose that we must aim at in the world, as well as with the reciprocal reference of the world to that moral purpose, and the external possibility of its accomplishment (to which no physical Teleology can lead us). Hence the question necessarily arises, whether it compels our rational judgement to go beyond the world and seek an intelligent supreme principle for that reference of nature to the moral in us; in order to represent nature as purposive even in reference to378 our inner moral legislation and its possible accomplishment. There is therefore certainly a moral Teleology, which is connected on the one hand with the nomothetic of freedom and on the other with that of nature; just as necessarily as civil legislation is connected with the question where the executive authority is to be sought, and in general in every case [with the question] wherein Reason is to furnish a principle of the actuality of a certain regular order of things only possible according to Ideas.— We shall first set forth the progress of Reason from that moral Teleology and its reference to physical, to Theology; and then make some observations upon the possibility and the validity of this way of reasoning.
If we assume the being of certain things (or even only certain forms of things) to be contingent and so to be possible only through something else which is their cause, we may seek for the unconditioned ground of this causality of the supreme (and so of the conditioned) either in the physical or the teleological order (either according to the nexus effectivus or the nexus finalis). That is, we may either ask, what is the supreme productive cause of these things; or what is their supreme (absolutely unconditioned) purpose, i.e. the final purpose of that cause in its production of this or all its products generally? In the second case it is plainly presupposed that this cause is capable of representing purposes to itself, and consequently is an intelligent Being; at least it must be thought as acting in accordance with the laws of such a being.
If we follow the latter order, it is a Fundamental Proposition to which even the commonest human Reason is compelled to give immediate379 assent, that if there is to be in general a final purpose furnished a priori by Reason, this can be no other than man (every rational being of the world) under moral laws.133 For (and so every one judges) if the world consisted of mere lifeless, or even in part of living but irrational, beings, its existence would have no worth because in it there would be no being who would have the least concept of what worth is. Again, if there were intelligent beings, whose Reason were only able to place the worth of the existence of things in the relation of380 nature to themselves (their well-being), but not to furnish of itself an original worth (in freedom), then there would certainly be (relative) purposes in the world, but no (absolute) final purpose, because the existence of such rational beings would be always purposeless. But the moral laws have this peculiar characteristic that they prescribe to Reason something as a purpose without any condition, and consequently exactly as the concept of a final purpose requires. The existence of a Reason that can be for itself the supreme law in the purposive reference, in other words the existence of rational beings under moral laws, can therefore alone be thought as the final purpose of the being of a world. If on the contrary this be not so, there would be either no purpose at all in the cause of its being, or there would be purposes, but no final purpose.
The moral law as the formal rational condition of the use of our freedom obliges us by itself alone, without depending on any purpose as material condition; but it nevertheless determines for us, and indeed a priori, a final purpose towards which it obliges us to strive; and this purpose is the highest good in the world possible through freedom.
The subjective condition under which man (and, according to all our concepts, every rational finite being) can set a final purpose before himself under the above law is happiness. Consequently, the highest physical good possible in the world, to be furthered as a final purpose as far as in us lies, is happiness, under the objective condition of the harmony of man with the law of morality as worthiness to be happy.
But it is impossible for us in accordance with all our rational faculties to represent these two381 requirements of the final purpose proposed to us by the moral law, as connected by merely natural causes, and yet as conformable to the Idea of that final purpose. Hence the concept of the practical necessity of such a purpose through the application of our powers does not harmonise with the theoretical concept of the physical possibility of working it out, if we connect with our freedom no other causality (as a means) than that of nature.
Consequently, we must assume a moral World-Cause (an Author of the world), in order to set before ourselves a final purpose consistently with the moral law; and in so far as the latter is necessary, so far (i.e. in the same degree and on the same ground) the former also must be necessarily assumed; i.e. we must admit that there is a God.134
This proof, to which we can easily give the form of logical precision, does not say: it is as necessary to assume the Being of God as to recognise the validity of the moral law; and consequently he who cannot convince himself of the first, can judge himself free from the obligations of the second. No! there must in such case only be given up the aiming at the final purpose in the world, to be brought about by the pursuit of the second (viz. a happiness of rational beings in harmony with the pursuit of moral laws, regarded as the highest382 good). Every rational being would yet have to cognise himself as straitly bound by the precepts of morality, for its laws are formal and command unconditionally without respect to purposes (as the matter of volition). But the one requisite of the final purpose, as practical Reason prescribes it to beings of the world, is an irresistible purpose imposed on them by their nature (as finite beings), which Reason wishes to know as subject only to the moral law as inviolable condition, or even as universally set up in accordance with it. Thus Reason takes for final purpose the furthering of happiness in harmony with morality. To further this so far as is in our power (i.e. in respect of happiness) is commanded us by the moral law; be the issue of this endeavour what it may. The fulfilling of duty consists in the form of the earnest will, not in the intermediate causes of success.
