" No wonder we call an experience like this a breakdown. It may sound familiar to anyone who has suffered depression, and it can also occur in various neurological disorders. For Heidegger, it would be an extreme case of the collapse of everyday Being-in-the-world, a collapse that makes everything obtrusive, disarticulated, and impossible to negotiate with our usual blithe disregard. "

― Sarah Bakewell , At the Existentialist Café: Freedom, Being, and Apricot Cocktails