From The Unbearable Lightness of Being by Milan Kundera:
“Our day to day life is bombarded with fortuities or, to be more precise, with the accidental meetings of people and events we call coincidences. ‘Co-incidences’ means that two events unexpectedly happen at the same time, they meet: Tomas appears in the hotel restaurant at the same time the radio is playing Beethoven. We do not even notice the great majority of such coincidences. If the seat Tomas occupied had been occupied instead by the local butcher, Tereza never would have noticed that the radio was playing Beethoven (though the meeting of Beethoven and the butcher would also have been an interesting coincidence). But her nascent love inflamed her sense of beauty and she would never forget that music. Whenever she heard it, she would be touched. Everything going on around her at that moment would be haloed by the music and take on its beauty.
… [Human lives] are composed like music. Guided by his sense of beauty, an individual transforms a fortuitous occurrence (Beethoven’s music, death under a train) into a motif, which then assumes a permanent place in the composition of the individual’s life… Without realising it, the individual composes his life according to the laws of beauty even in times of greatest distress.
It is wrong, then, to chide the novel for being fascinated by mysterious coincidences, but it is right to chide man for being blind to such coincidences in his daily life. For he thereby deprives his life of a dimension of beauty.”