Kant [...] stated that he had “found it necessary to deny knowledge […] to make room for faith,” but all he had “denied” was knowledge of things that… - Hannah Arendt

Kant was also quite aware that "the urgent need" of reason is both different from and "more than mere quest and desire for knowledge." Hence, the distinguishing of the two faculties, reason and intellect, coincides with a distinction between two altogether different mental activities, thinking and knowing.

[H]e was genuinely incapable of uttering a single sentence that was not a cliché.[…] Eichmann, despite his rather bad memory, repeated word for word the same stock phrases and self-invented clichés (when he did succeed in constructing a sentence of his own, he repeated it until it became a cliché) each time he referred to an incident or event of importance to him.[…] The longer one listened to him, the more obvious it became that his inability to speak was closely connected with an inability to think, namely to think from the standpoint of somebody else. No communication was possible with him, not because he lied but because he was surrounded by the most reliable of all safeguards against the words and the presence of others, and hence against reality as such.

[…]the simple-minded positivism that believes it has found a firm ground of certainty if it only excludes all mental phenomena from consideration and holds fast to observable facts.