Critique of Judgement by Immanuel Kant Chapter 92 Page 4

resting upon a merely metaphysical natural concept concludes from the concept of the Being the most real of all, it’s absolutely necessary existence; for (it is said), if it did not exist, a reality would be wanting to it, viz. existence. — The other (which is also called the metaphysico-cosmological proof) concludes from the necessity of the existence somewhere of a thing (which must be conceded, for a being is given to us in self-consciousness), its complete determination as that of a Being the most real of all; for everything existing must be completely determined, but the absolutely necessary (i.e. that which we ought to cognise as such and consequently a priori) must be completely determined by means of its own concept. But this is only the case with the concept of a thing