Discovering that your childhood idols are now virtually ancient is usually a disturbing reminder of your own mortality. But for me, realising that 5th May 2013 marks the 200th anniversary of Søren Kierkegaard’s birth was more of a reminder of his immortality. It’s a strange word to use for a thinker who lived with a presentiment of his own death and didn’t reach his 43rd birthday. Kierkegaard was the master of irony and paradox before both became debased by careless overuse. He was an existentialist a century before Jean-Paul Sarte, more rigorously post-modern than postmodernism, and a theist whose attacks on religion bit far deeper than many of those of today’s new atheists. Kierkegaard is not so much a thinker for our time but a timeless thinker, whose work is pertinent for all ages yet destined to be fully attuned to none.