I reconstruct the preliminary arguments of the Transcendental Aesthetic, which provide the criteria of on which Kant’s central arguments will turn. Kant characterizes intuition as (i) object-giving, (ii) immediate, (iii) affection-dependent representation containing (iv) a matter of sensation that can be distinguished from (v) an a priori form. I explain Kant’s curiously teleological claim that all thought “aims at” intuition in terms of his “baseline conception” of intuition as providing nonintellectual grounds of truth: This is what it means for intuition to be object-giving. I then argue that Kant’s theory of discursive marks entails that object-giving representations must be immediate. Further, the intuition paired with a discursive intellect must be receptive (i.e. affection dependent). These claims can be justified via pure apperception. What cannot be is Kant’s characterization of intuition as sensible. But I show that Kant’s form/matter distinction and his subsequent arguments require only the receptivity of intuition, not its sensory embodiment. The chief doctrines of the Aesthetic can be justified via pure apperception, as part of a top-down approach to intuition.