Human, All-Too-Human: A Book for Free Spirits, Part 1 / Complete Works, Volume Six

Nietzsche's essay, Richard Wagner in Bayreuth, appeared in 1876, and his next publication was his present work, which was issued in 1878. A comparison of the books will show that the two years of meditation intervening had brought about a great change in Nietzsche's views, his style of expressing them, and the form in which they were cast. The Dionysian, overflowing with life, gives way to an Apollonian thinker with a touch of pessimism. The long essay form is abandoned, and instead we have a series of aphorisms, some tinged with melancholy, others with satire, several, especially towards the end, with Nietzschian wit at its best, and a few at the beginning so very abstruse as to require careful study.
The form of this book will be better understood when it is remembered that at this period Nietzsche was beginning to suffer from stomach trouble and headaches. As a cure for his complaints, he spent his time in travel when he could get a few weeks' respite from his duties at Basel University; and it was in the course of his solitary walks and hill-climbing tours that the majority of these thoughts occurred to him and were jotted down there and then. A few of them, however, date further back, as he tells us in the preface to the second part of this work. Many of them, he says, occupied his mind even before he published his first book, The Birth of Tragedy and several others, as we learn from his notebooks and posthumous writings, date from the period of the Thoughts out of Season.
It must be clearly understood, however, that Nietzsche's disease must not be looked upon in the same way as that of an ordinary man. People are inclined to regard a sick man as rancorous; but any one who rights with and conquers his disease, and even exploits it, as Nietzsche did, benefits thereby to an extraordinary degree. In the first place, he has passed through several stages of human psychology with which a healthy man is entirely unacquainted; e.g. he has learnt by introspection the spiteful and revengeful spirit of the sick man and his religion. Secondly, in his moments of freedom from pain and gloom his thoughts will be all the more brilliant.