In April 1917 Kafka went for an eight- month visit at the home of his sister Ottla and her husband in the Bohemian town of Zurau. Shortly after arriving he began to spit blood, the sign that tuberculosis truly had come. According to Calasso's introduction this did not dishearten Kafka but rather liberated him. Calasso says that the eight months in Zurau were the happiest of Kafka's life as they enabled him to be away from the family, the office, the questions of marriage , the areas in life which disturbed him. He could be totally within himself in the realm Calasso says Kafka most at home in.
As a student Calasso came across these aphorisms in original manuscript. He noticed that they were written in an unusual way. Usually Kafka crowded his writing line after line into his notebooks. Here each aphorism was presented on its own on a single page. And this is the way this edition of them presents them, one at a time surrounded by much empty space. As Calasso points out most of Kafka's aphorisms were not what we ordinarily think of as that, though some were close. His aphorisms might be parables, or small narratives. The key is that the few lines they consist in must be seen in isolation surrounded by empty space, so that they can be read in themselves with maximum concentration.
If I recall rightly most of these aphorisms were published in a work of Kafka edited by his friend, Max Brod.
In any case the paradoxical beauty, the tremendous depth of Kafka's thought is found here in these isolated entries. I would take exception to the 'puff of the publisher' that they represent Kafka's 'philosophy'. Kafka was not a philosopher and did not have a philosophy but rather his own way of seeing and thinking about the world, an uncanny remarkable original and hauntingly painful and beautiful way.