The Danish philosopher's influential work, outlining the distinction between Socratic irony and the leap of faith required for Christian belief, argues that freedom, which cannot be understood or proved, is the necessary condition for Christianity. Also includes the unfinished narrative "Johannes Climacus" in which a man sets out to doubt everything - a critique of Cartesian and Hegelian approaches to philosophy.

The Danish philosopher's influential work, outlining the distinction between Socratic irony and the leap of faith required for Christian belief, argues that freedom, which cannot be understood or proved, is the necessary condition for Christianity. Also includes the unfinished narrative "Johannes Climacus" in which a man sets out to doubt everything - a critique of Cartesian and Hegelian approaches to philosophy.