English summary: This book is both a study about the Socratic-Platonic conception of a good life, and an analytical study on self-knowledge, self-determination, and moral motivation. In the first part of his book, the author provides a detailed analysis of arguments from The Apology, Protagoras, Laches, Meno, Gorgias, Charmides, Republic, and Phaedo. For Socrates, the life we ought to...