To the realists.—You sober people who feel well armed against passion and fantasies and would like to turn your emptiness into a matter of pride and ornament: you call yourselves realists and hint that the world really is the way it appears to you. As if reality stood unveiled before you only, and you yourselves were perhaps the best part of it … But in your unveiled state are not even you still very passionate and dark creatures compared to fish, and still far too similar to an artist in love? And what is ‘reality’ for an artist in love? You are still burdened with those estimates of things that have their origin in the passions and loves of former centuries. Your sobriety still contains a secret and inextinguishable drunkenness. Your love of ‘reality’, for example—oh, that is a primeval ‘love’ … Subtract the phantasm and every human contribution from it, my sober friends! If you can! If you can forget your descent, your past, your training—all of your humanity and animality. (F. Nietzsche, The Gay Science, Book Two, extract from Section 57)

We are reflective creatures, capable of thoughts about thoughts, feelings about feelings, and emotions about emotions. Of course, we can be unreflectively engaged in daily interaction with the world, and most of us often are. But our capacity for reflection gives rise to something of a need: a need to understand our lives though reflection on what has happened.