Book excerpt: The School of Life offers radical ways to help us raid the treasure trove of human knowledge' Independent on Sunday Soren Kierkegaard was a Danish philosopher, theologian, literary stylist and social critic. Born in 1813 in Copenhagen, his philosophical work addressed living as a single individual and the importance of personal choice. A famously fierce critic of the idealist thinkers of his time, he is regarded as the first existentialist philosopher. Here you will find insights from his greatest works. The Life Lessons series from The School of Life takes a great thinker and highlights those ideas most relevant to ordinary, everyday dilemmas. These books emphasize ways in which wise voices from the past have urgently important and inspiring things to tell us. 'thoroughly welcoming and approachable ... [Robert Ferguson] communicates strongly his enthusiams, indeed his love, for this Manichean of the north, and writes of him beautifully ... If the six books in the Life Lessons series can teach even a few readers to pay passionate heed to the world - to notice things - they will have been an unquestionable success' John Banville, Prospect 'there is a good deal to be learned from these little primers' Observer