In part because of Ritschl's support, Nietzsche received a remarkable offer in 1869 to become professor of classical philology at the University of Basel in Switzerland. He was only 24 years old and had neither completed his doctorate nor received a teaching certificate ("habilitation"). He was awarded an honorary doctorate by the University of Leipzig, again with Ritschl's support.Despite the fact that the offer came at a time when he was considering giving up philology for science, he accepted. To this day, Nietzsche is still among the youngest of the tenured Classics professors on record.Nietzsche's 1870 projected doctoral thesis, Contribution toward the Study and the Critique of the Sources of Diogenes Laertius (Beiträge zur Quellenkunde und Kritik des Laertius Diogenes), examined the origins of the ideas of Diogenes Laërtius. Though never submitted, it was later published as a Gratulationsschrift (congratulatory publication) at Basel.Before moving to Basel, Nietzsche renounced his Prussian citizenship: for the rest of his life he remained officially stateless.Nevertheless, Nietzsche served in the Prussian forces during the Franco-Prussian War (1870–1871) as a medical orderly. In his short time in the military, he experienced much and witnessed the traumatic effects of battle. He also contracted diphtheria and dysentery. Walter Kaufmann speculates that he might also have contracted syphilis at a brothel along with his other infections at this time. On returning to Basel in 1870, Nietzsche observed the establishment of the German Empire and Otto von Bismarck's subsequent policies as an outsider and with a degree of skepticism regarding their genuineness. His inaugural lecture at the university was "Homer and Classical Philology". Nietzsche also met Franz Overbeck, a professor of theology who remained his friend throughout his life. Afrikan Spir, a little-known Russian philosopher responsible for the 1873 Thought and Reality, and Nietzsche's colleague the famed historian Jacob Burckhardt, whose lectures Nietzsche frequently attended, began to exercise significant influence on him during this time.Nietzsche had already met Richard Wagner in Leipzig in 1868 and later Wagner's wife, Cosima. Nietzsche admired both greatly and during his time at Basel frequently visited Wagner's house in Tribschen in Lucerne. The Wagners brought Nietzsche into their most intimate circle—including Franz Liszt, of whom Nietzsche colloquially described: "Liszt or the art of running after women!". Nietzsche enjoyed the attention he gave to the beginning of the Bayreuth Festival. In 1870, he gave Cosima Wagner the manuscript of "The Genesis of the Tragic Idea" as a birthday gift. In 1872, Nietzsche published his first book, The Birth of Tragedy. However, his colleagues within his field, including Ritschl, expressed little enthusiasm for the work in which Nietzsche eschewed the classical philologic method in favor of a more speculative approach. In his polemic Philology of the Future, Ulrich von Wilamowitz-Moellendorff dampened the book's reception and increased its notoriety. In response, Rohde (then a professor in Kiel) and Wagner came to Nietzsche's defense. Nietzsche remarked freely about the isolation he felt within the philological community and attempted unsuccessfully to transfer to a position in philosophy at Basel instead.

Question: What was Nietzsche feeling that was talked about openly?
Answer: isolation