Some people get introduced to the overwhelming feeling of existential despair and the dichotomy of being and nothingness when reading philosophical works like Heidegger's What is Metaphysics?, or other equally depressing but profound works. One could also read Leibniz or Avicenna to get introduced to a little modal logic.For others, like comedian Louis C.K., experiencing existential angst can be equally accomplished from the comfort of his own home by simply having what starts out as a casual and innocent conversation with his four-year-old kid. If you have kids, I'm sure you'll be able to relate :)
So which would you prefer? Heidegger or a child? :)