Kant and Kierkegaard are two philosophers who are not usually bracketed together. Yet, for one commentator, Ronald Green, in his book Kierkegaard and Kant: The Hidden Debt , a deep similarity between them is seen in the centrality both accord to the notion of freedom. Kierkegaard, for example, in one of his Journal entries, expresses a ‘passion’ for human freedom. Freedom is for Kierkegaard also linked to a paradox that lies at the heart of thought. In Philosophical Fragment Kierkegaard writes (...) about the ‘paradox of thought’: ‘the paradox is the passion of thought […] the thinker without the paradox is like the lover without the passion.’. (shrink)