Critique of Judgement by Immanuel Kant Chapter 92 Page 30

Categories, which can have no significance for cognition in a theoretical aspect, if they are not applied to objects of possible experience. — However, according to the analogy of an Understanding I can in a certain other aspect think a supersensible being, without at the same time meaning thereby to cognise it theoretically; viz.

if this determination of its causality concerns an effect in the world, which contains a design morally necessary but unattainable by a sensible being. For then a cognition of God and of His Being (Theology) is possible by means of properties and determinations of His causality merely thought in Him according to analogy, which has all requisite reality in a practical reference though only in respect of this (as moral). — An Ethical Theology is therefore