Either - Or

Søren Kierkegaard (1813-1855) – Danish philosopher, theologian, and writer, is rightly considered both a precursor and the founder of European existentialism.

The treatise "Either - Or" is the first major work of the greatest Christian existentialist Søren Kierkegaard, in which the author presents his vision of the ethical and aesthetic stages of human existence.
This edition includes four main parts from this treatise, which can be perceived as independent works:
"Aphorisms of the Aesthete"
"The Most Unhappy"
"The Seducer's Diary"
"Harmonious Development of the Aesthetic and Ethical Principles in the Human Personality"